Former French Presidents Francois Hollande and Nicolas Sarkozy attend a national ceremony for the thirteen French soldiers killed in Mali, at the Hotel National des Invalides in Paris, France, December 2, 2019. French soldiers Julien Carrette, Benjamin Gireud, Romain Salles de Saint-Paul, Clement Frison-Roche, Nicolas Megard, Romain Chomel de Jarnieu, Pierre Bockel, Alex Morisse, Jeremy Leusie, Alexandre Protin, Antoine Serre, Valentin Duval, Andrei Jouk died in Mali when their helicopters collided in the dark last week as they hunted for Islamist militants. REUTERS/Charles Platiau 

Former French Presidents Francois Hollande and Nicolas Sarkozy attend a national ceremony for the thirteen French soldiers killed in Mali, at the Hotel National des Invalides in Paris, France, December 2, 2019. French soldiers Julien Carrette, Benjamin Gireud, Romain Salles de Saint-Paul, Clement Frison-Roche, Nicolas Megard, Romain Chomel de Jarnieu, Pierre Bockel, Alex Morisse, Jeremy Leusie, Alexandre Protin, Antoine Serre, Valentin Duval, Andrei Jouk died in Mali when their helicopters collided in the dark last week as they hunted for Islamist militants. REUTERS/Charles Platiau 

Former French Presidents Francois Hollande and Nicolas Sarkozy attend a national ceremony for the thirteen French soldiers killed in Mali, at the Hotel National des Invalides in Paris, France, December 2, 2019. French soldiers Julien Carrette, Benjamin Gireud, Romain Salles de Saint-Paul, Clement Frison-Roche, Nicolas Megard, Romain Chomel de Jarnieu, Pierre Bockel, Alex Morisse, Jeremy Leusie, Alexandre Protin, Antoine Serre, Valentin Duval, Andrei Jouk died in Mali when their helicopters collided in the dark last week as they hunted for Islamist militants. REUTERS/Charles Platiau 

Former French Presidents Francois Hollande and Nicolas Sarkozy attend a national ceremony for the thirteen French soldiers killed in Mali, at the Hotel National des Invalides in Paris, France, December 2, 2019. French soldiers Julien Carrette, Benjamin Gireud, Romain Salles de Saint-Paul, Clement Frison-Roche, Nicolas Megard, Romain Chomel de Jarnieu, Pierre Bockel, Alex Morisse, Jeremy Leusie, Alexandre Protin, Antoine Serre, Valentin Duval, Andrei Jouk died in Mali when their helicopters collided in the dark last week as they hunted for Islamist militants. REUTERS/Charles Platiau 

Former French Presidents Francois Hollande and Nicolas Sarkozy attend a national ceremony for the thirteen French soldiers killed in Mali, at the Hotel National des Invalides in Paris, France, December 2, 2019. French soldiers Julien Carrette, Benjamin Gireud, Romain Salles de Saint-Paul, Clement Frison-Roche, Nicolas Megard, Romain Chomel de Jarnieu, Pierre Bockel, Alex Morisse, Jeremy Leusie, Alexandre Protin, Antoine Serre, Valentin Duval, Andrei Jouk died in Mali when their helicopters collided in the dark last week as they hunted for Islamist militants. REUTERS/Charles Platiau 

Former French Presidents Francois Hollande and Nicolas Sarkozy attend a national ceremony for the thirteen French soldiers killed in Mali, at the Hotel National des Invalides in Paris, France, December 2, 2019. French soldiers Julien Carrette, Benjamin Gireud, Romain Salles de Saint-Paul, Clement Frison-Roche, Nicolas Megard, Romain Chomel de Jarnieu, Pierre Bockel, Alex Morisse, Jeremy Leusie, Alexandre Protin, Antoine Serre, Valentin Duval, Andrei Jouk died in Mali when their helicopters collided in the dark last week as they hunted for Islamist militants. REUTERS/Charles Platiau 

Former French Presidents Francois Hollande and Nicolas Sarkozy, Richard Ferrand, speaker of the French National Assembly, attend a national ceremony for the thirteen French soldiers killed in Mali, at the Hotel National des Invalides in Paris, France, December 2, 2019. French soldiers Julien Carrette, Benjamin Gireud, Romain Salles de Saint-Paul, Clement Frison-Roche, Nicolas Megard, Romain Chomel de Jarnieu, Pierre Bockel, Alex Morisse, Jeremy Leusie, Alexandre Protin, Antoine Serre, Valentin Duval, Andrei Jouk died in Mali when their helicopters collided in the dark last week as they hunted for Islamist militants. REUTERS/Charles Platiau 

Former French Presidents Francois Hollande and Nicolas Sarkozy, Richard Ferrand, speaker of the French National Assembly, attend a national ceremony for the thirteen French soldiers killed in Mali, at the Hotel National des Invalides in Paris, France, December 2, 2019. French soldiers Julien Carrette, Benjamin Gireud, Romain Salles de Saint-Paul, Clement Frison-Roche, Nicolas Megard, Romain Chomel de Jarnieu, Pierre Bockel, Alex Morisse, Jeremy Leusie, Alexandre Protin, Antoine Serre, Valentin Duval, Andrei Jouk died in Mali when their helicopters collided in the dark last week as they hunted for Islamist militants. REUTERS/Charles Platiau 

Former French President Nicolas Sarkozy arrives to attend the Court Banquet after the Ceremony of the Enthronement of Emperor Naruhito in Tokyo, Japan October 22, 2019. Pierre Emmanuel Deletree/Pool via REUTERS 

The president of the Rhones Alpes region Laurent Wauquiez (L), (From 3rd L) French Junior Minister for territorial communities Sebastien Lecornu, French Education and Youth Affairs Minister Jean-Michel Blanquer, former French president Nicolas Sarkozy, French President Emmanuel Macron, Haute Savoie prefect Pierre Lambert, and French Junior Defence Minister Genevieve Darrieussecq sit during a ceremony in tribute to World War II resistance fighters killed at the plateau des Glieres, at the Necropole de Morette military cemetery in Thones, France, March 31, 2019. Ludovic Marin/Pool via REUTERS 

French President Emmanuel Macron, former French president Nicolas Sarkozy and Haute Savoie prefect Pierre Lambert sit during a ceremony in tribute to World War II resistance fighters killed at the plateau des Glieres, at the Necropole de Morette military cemetery in Thones, France, March 31, 2019. Ludovic Marin/Pool via REUTERS 

French President Emmanuel Macron, former French president Nicolas Sarkozy and Haute Savoie prefect Pierre Lambert sit during a ceremony in tribute to World War II resistance fighters killed at the plateau des Glieres, at the Necropole de Morette military cemetery in Thones, France, March 31, 2019. Ludovic Marin/Pool via REUTERS 

French President Emmanuel Macron, former French president Nicolas Sarkozy and Haute Savoie prefect Pierre Lambert sit during a ceremony in tribute to World War II resistance fighters killed at the plateau des Glieres, at the Necropole de Morette military cemetery in Thones, France, March 31, 2019. Ludovic Marin/Pool via REUTERS 

Former French President Nicolas Sarkozy (2ndL) and his wife Carla Bruni (2ndR) talk with Jean Veil (L) and Pierre-Francois Veil, the sons of late Auschwitz survivor and French health minister Simone Veil and her late husband Antoine Veil, before a tribute at the Pantheon in Paris, France, July 1, 2018. Ludovic Marin/Pool via Reuters 

Former French President Nicolas Sarkozy (2ndL) and his wife Carla Bruni (2ndR) talk with Jean Veil (L) and Pierre-Francois Veil, the sons of late Auschwitz survivor and French health minister Simone Veil and her late husband Antoine Veil, before a tribute at the Pantheon in Paris, France, July 1, 2018. Ludovic Marin/Pool via Reuters 

Former French President Nicolas Sarkozy (2ndL) and his wife Carla Bruni (2ndR) talk with Jean Veil (L) and Pierre-Francois Veil, the sons of late Auschwitz survivor and French health minister Simone Veil and her late husband Antoine Veil, before a tribute at the Pantheon in Paris, France, July 1, 2018. Ludovic Marin/Pool via Reuters 

(L-R) Former French First Lady Bernadette Chira and her daughter Claude Chirac, former French President Nicolas Sarkozy, former French Prime Minister Jean-Pierre Raffarin, former French President Francois Hollande and former French Prime Minister Dominique de Villepin attends a national tribute ceremony for late French politician Simone Veil, Holocaust survivor and pro-abortion campaigner, at the Hotel des Invalides in Paris, France, July 5, 2017. REUTERS/Michel Euler/Pool 

Former French Presidents Francois Hollande (C) and Nicolas Sarkozy (L), and Paris Mayor Anne Hidalgo (R) attend a national tribute ceremony for late French politician Simone Veil, Holocaust survivor and pro-abortion campaigner, at the Hotel des Invalides in Paris, France, July 5, 2017. At 2nd row, former French Prime Ministers Jean-Pierre Raffarin, Dominique de Villepin and Francois Fillon. REUTERS/Philippe Wojazer 

Football Soccer - Paris Saint Germain FC v Toulouse - French Ligue 1 - Parc des Princes stadium, 19/2/2017. Pierre Sarkozy, son of former French President Nicolas Sarkozy, speaks with his father's lawyer Thierry Herzog as they attend the match. REUTERS/Charles Platiau 

French Football Soccer - Paris Saint Germain FC v Toulouse - French Ligue 1 - Parc des Princes stadium, 19/2/2017. Sons of former French President Nicolas Sarkozy, Jean, Louis and Pierre Sarkozy attend the Paris Saint Germain FC v Toulouse match. REUTERS/Charles Platiau 

Nicolas Sarkozy (R), former head of the Les Republicains political party (LR) and former French president shakes hands with French employer's body MEDEF union leader Pierre Gattaz (L) during the MEDEF union summer forum on the campus of the HEC School of Management in Jouy-en-Josas, near Paris, France, August 31, 2016. REUTERS/Charles Platiau

Nicolas Sarkozy (R), former head of the Les Republicains (LR) political party and former French president shakes hands with French employer's body MEDEF union leader Pierre Gattaz (L) during the MEDEF union summer forum on the campus of the HEC School of Management in Jouy-en-Josas, near Paris, France, August 31, 2016. REUTERS/Charles Platiau

Pierre (L) and Jean Sarkozy, sons of Nicolas Sarkozy, head of France's Les Republicains political party and former French President, attend the Champions League quarter-final first leg soccer match where Paris St Germain faces Manchester City at the Parc des Princes Stadium in Paris France, April 6, 2016. Picture April 6, 2016. REUTERS/Gonzalo Fuentes 

Football Soccer - Paris St Germain v Monaco - French Ligue 1 - Parc des Princes stadium, Paris, France - 20/03/2016. Former French President Nicolas Sarkozy's sons Pierre (R), and Jean (L). Picture taken March 20, 2016. REUTERS/Charles Platiau 

Mayor of Nice, Christian Estrosi (L), speaks as former French president and head of the conservative Les Republicains party Nicolas Sarkozy (3rdR), his wife Carla Bruni-Sarkozy, and Eric Ciotti (R), head of the Alpes-Maritimes region general council, attend a meeting organized by young party members in Nice, July 19, 2015. REUTERS/Jean-Pierre Amet

Former French president and head of the conservative Les Republicains political party Nicolas Sarkozy reacts as he is embraced by a woman at a meeting organized by young party members in Nice, July 19, 2015. REUTERS/Jean-Pierre Amet 

Former French president and head of the conservative Les Republicains party Nicolas Sarkozy (L), his wife Carla Bruni-Sarkozy, and Eric Ciotti (R), head of the Alpes-Maritimes region general council, attend a meeting organized by young party members in Nice, July 19, 2015. REUTERS/Jean-Pierre Amet

Former French president and head of the conservative Les Republicains political party Nicolas Sarkozy attends a meeting organized by young party members in Nice, July 19, 2015. REUTERS/Jean-Pierre Amet

Former French president and head of the conservative Les Republicains political party Nicolas Sarkozy attends a meeting organized by young party members in Nice, July 19, 2015. REUTERS/Jean-Pierre Amet

Carla Bruni-Sarkozy (L) poses for a souvenir photo during a meeting organized by young members of the conservative Les Republicains political party in Nice, July 19, 2015. REUTERS/Jean-Pierre Amet

Carla Bruni-Sarkozy (R) poses during a meeting organized by young members of the conservative Les Republicains political party in Nice, July 19, 2015. REUTERS/Jean-Pierre Amet

Former French president and head of the conservative Les Republicains political party Nicolas Sarkozy leaves the podium during a meeting organized by young party members in Nice, July 19, 2015. REUTERS/Jean-Pierre Amet

Carla Bruni-Sarkozy kisses her husband Nicolas Sarkozy, former French president and head of the conservative Les Republicains political party during a meeting organized by young party members in Nice, July 19, 2015. REUTERS/Jean-Pierre Amet

Former French president and head of the conservative Les Republicains political party Nicolas Sarkozy (L) and his wife Carla Bruni-Sarkozy attend a meeting organized by young members of the party in Nice, July 19, 2015. REUTERS/Jean-Pierre Amet

Former French president and head of the conservative Les Republicains political party Nicolas Sarkozy (R) and his wife Carla Bruni-Sarkozy arrive to attend a meeting organized by young members of the party in Nice, July 19, 2015. REUTERS/Jean-Pierre Amet

Former French president and head of the conservative Les Republicains political party Nicolas Sarkozy (L) and his wife Carla Bruni-Sarkozy attend a meeting organized by young members of the party in Nice, July 19, 2015. REUTERS/Jean-Pierre Amet

Former French President Nicolas Sarkozy's son Pierre attends the French Ligue 1 soccer match between Paris St Germain and Reims at the Parc des Princes stadium in Paris, France, May 23, 2015. REUTERS/Charles Platiau 

Former president and current UMP conservative political party head Nicolas Sarkozy (2ndL) speaks outside the Elysee Palace with former prime ministers Jean-Pierre Raffarin (L), Alain Juppe (C) and Francois Fillon (R), in Paris January 11, 2015. Former president Sarkozy took part in a solidarity march (Marche Republicaine) to the victims following the shootings by gunmen at the offices of the satirical weekly newspaper Charlie Hebdo, the killing of a police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes, which claimed 17 lives. Picture taken January 11, 2015. REUTERS/Pascal Rossignol (FRANCE - Tags: CRIME LAW POLITICS) 

Former president and current UMP conservative political party head Nicolas Sarkozy speaks outside the Elysee Palace with former prime ministers Jean-Pierre Raffarin, Alain Juppe and Francois Fillon, in Paris January 11, 2015. President Hollande and former president Sarkozy took part in a solidarity march (Marche Republicaine) to the victims following the shootings by gunmen at the offices of the satirical weekly newspaper Charlie Hebdo, the killing of a police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes, which claimed 17 lives. Picture taken January 11, 2015. REUTERS/Pascal Rossignol (FRANCE - Tags: CRIME LAW) 

French President Francois Hollande (3rdR) poses with former president and current UMP conservative political party head Nicolas Sarkozy (3rdL) and former prime ministers Jean-Pierre Raffarin (L), Edouard Balladur (2ndL), Alain Juppe (2ndR) and Francois Fillon (R), in Paris January 11, 2015. President Hollande, former president Sarkozy and the former prime ministers took part in a solidarity march (Marche Republicaine) to the victims following the shootings by gunmen at the offices of the satirical weekly newspaper Charlie Hebdo, the killing of a police woman in Montrouge, and the hostage taking at a kosher supermarket at the Porte de Vincennes, which claimed 17 lives. Picture taken January 11, 2015. REUTERS/Pascal Rossignol (FRANCE - Tags: CRIME LAW) MEDIA) 

Former French President Nicolas Sarkozy's sons Pierre (L), Jean (C) and Louis attend a political rally as their father campaigns for the leadership of the UMP political party in Boulogne-Billancourt, Paris suburb, November 25, 2014. REUTERS/Philippe Wojazer (FRANCE - Tags: POLITICS) 

Head of the French markets regulator AMF Jean-Pierre Jouyet, arrives for a meeting at the Elysee Palace in Paris, April 10, 2009. Former French prime minister Francois Fillon accused Jouyet, who is currently President Francois Hollande's chief of staff, of lying on Sunday after a media report accused Fillon of asking him to accelerate a legal case against his rival Nicolas Sarkozy. Picture taken April 10, 2009. REUTERS/Philippe Wojazer (REUTERS - Tags: POLITICS) 

Head of the French markets regulator AMF Jean-Pierre Jouyet, arrives for a meeting at the Elysee Palace in Paris, April 10, 2009. Former French prime minister Francois Fillon accused Jouyet, who is currently President Francois Hollande's chief of staff, of lying on Sunday after a media report accused Fillon of asking him to accelerate a legal case against his rival Nicolas Sarkozy. Picture taken April 10, 2009. REUTERS/Philippe Wojazer (REUTERS - Tags: POLITICS) 

Former French President Nicolas Sarkozy's son Pierre attends a French Ligue 1 soccer match between Paris St Germain and Olympique Marseille at the Parc des Princes stadium in Paris, November 9, 2014. REUTERS/Charles Platiau (FRANCE - Tags: SPORT SOCCER) 

Former French President Nicolas Sarkozy's son Pierre (R) attends the French Ligue 1 soccer match between Paris Saint-Germain and Olympique Lyon at Parc des Princes stadium in Paris December 1, 2013. REUTERS/Gonzalo Fuentes (FRANCE - Tags: SPORT SOCCER POLITICS) 

Former French President Nicolas Sarkozy's sons Louis (L) and Pierre arrive to attend the Champions League soccer match between Paris St-Germain and Olympiakos' Piraeus at the Parc des Princes Stadium in Paris November 27, 2013. REUTERS/Charles Platiau (FRANCE - Tags: SPORT SOCCER POLITICS)

ATTENTION EDITORS : FRENCH LAW REQUIRES THAT THE FACES OF MINORS ARE MASKED IN PUBLICATIONS WITHIN FRANCE 

Former French President Nicolas Sarkozy's sons Louis (center 2nd L) and Pierre (center 2nd R) attend the Champions League soccer match between Paris St-Germain and Olympiakos' Piraeus at the Parc des Princes Stadium in Paris November 27, 2013. REUTERS/Charles Platiau (FRANCE - Tags: SPORT SOCCER POLITICS)

ATTENTION EDITORS : FRENCH LAW REQUIRES THAT THE FACES OF MINORS ARE MASKED IN PUBLICATIONS WITHIN FRANCE 

Former French President Nicolas Sarkozy's sons Jean (L) and Pierre attend Paris St-Germain's Champions League soccer match against Anderlecht at the Parc des Princes Stadium in Paris November 5, 2013. REUTERS/Gonzalo Fuentes (FRANCE - Tags: SPORT SOCCER)

France's President Francois Hollande (L) with former French Presidents Nicolas Sarkozy (4thR) and Valery Giscard d'Estaing (3rdR) and members of the French government stand in front four flag-draped coffins during a religious ceremony inside the Invalides church in Paris June 14, 2012 as France pays tribute to the four soldiers killed last Saturday in Afghanistan during a national ceremony at the Invalides. At 5th R, French Defence Minister Jean-Yves Le Drian, and National Assembly speaker Bernard Accoyer (2ndR), Speaker of the French Senate Jean-Pierre Bel (R). REUTERS/Philippe Wojazer (FRANCE - Tags: POLITICS MILITARY) 

France's President Francois Hollande (2ndL) with former French Presidents Nicolas Sarkozy (4thR) and Valery Giscard d'Estaing (3rdR) and members of the French government stand in front four flag-draped coffins during a religious ceremony inside the Invalides church in Paris June 14, 2012 as France pays tribute to the four soldiers killed last Saturday in Afghanistan during a national ceremony at the Invalides. At 5th R, French Defence Minister Jean-Yves Le Drian, and National Assembly speaker Bernard Accoyer (2ndR), Speaker of the French Senate Jean-Pierre Bel (R). REUTERS/Philippe Wojazer (FRANCE - Tags: POLITICS MILITARY) 

France's President Francois Hollande (2ndL) with former French Presidents Nicolas Sarkozy (5thR) and Valery Giscard d'Estaing (4thR) and members of the French government stand in front four flag-draped coffins during a religious ceremony inside the Invalides church in Paris June 14, 2012 as France pays tribute to the four soldiers killed last Saturday in Afghanistan during a national ceremony at the Invalides. At 6th R, French Defence Minister Jean-Yves Le Drian, and National Assembly speaker Bernard Accoyer (3rdR), Speaker of the French Senate Jean-Pierre Bel (2ndR) and Prime Minister Jean-Marc Ayrault (R). REUTERS/Philippe Wojazer (FRANCE - Tags: POLITICS MILITARY) 

Jean-Pierre Jouyet, head of the French markets regulator AMF, arrives at the Elysee Palace for the handover ceremony between France's newly-elected President Francois Hollande and outgoing President Nicolas Sarkozy in Paris, May 15, 2012. REUTERS/Benoit Tessier (FRANCE - Tags: POLITICS) 

Jean-Pierre Jouyet, head of the French markets regulator AMF, arrives at the Elysee Palace for the handover ceremony between France's newly-elected President Francois Hollande and outgoing President Nicolas Sarkozy in Paris, May 15, 2012. REUTERS/Benoit Tessier (FRANCE - Tags: POLITICS) 

Jean-Pierre Jouyet, head of the French markets regulator AMF, arrives at the Elysee Palace for the handover ceremony between France's newly-elected President Francois Hollande and outgoing President Nicolas Sarkozy in Paris, May 15, 2012. REUTERS/Benoit Tessier (FRANCE - Tags: POLITICS) 

Former French Socialist Party Prime Minister Pierre Mauroy (C) arrives at the Elysee Palace for the handover ceremony between France's newly-elected President Francois Hollande and outgoing President Nicolas Sarkozy in Paris May 15, 2012. REUTERS/Benoit Tessier (FRANCE - Tags: POLITICS ENTERTAINMENT) 

Speaker of the French Senate Jean-Pierre Bel arrives at the Elysee Palace for the handover ceremony between France's newly-elected President Francois Hollande and outgoing President Nicolas Sarkozy in Paris May 15, 2012. REUTERS/Benoit Tessier (FRANCE - Tags: POLITICS) 

Former French Socialist Party Prime Minister Pierre Mauroy (C) arrives at the Elysee Palace for the handover ceremony between France's newly-elected President Francois Hollande and outgoing President Nicolas Sarkozy in Paris May 15, 2012. REUTERS/Benoit Tessier (FRANCE - Tags: POLITICS) ENTERTAINMENT) 

France's Junior Minister for Veterans' affairs Marc Laffineur (L), Foreign Trade Junior Minister Pierre Lellouche (2ndL), Agriculture, Food, Fisheries and Land Management Minister Bruno Le Maire (C), Solidarity and Social Cohesion Minister Roselyne Bachelot (2ndR) and Prime Minister Francois Fillon leave the Elysee Palace in Paris following the last weekly cabinet meeting of France's President Nicolas Sarkozy's government, May 9, 2012. REUTERS/Philippe Wojazer (FRANCE - Tags: POLITICS) 

France's Foreign Trade Junior Minister Pierre Lellouche (L), Agriculture, Food, Fisheries and Land Management Minister Bruno Le Maire (2ndL), Solidarity and Social Cohesion Minister Roselyne Bachelot (C), Budget, Civil Service and Budget Minister Valerie Pecresse (2ndR) and Prime Minister Francois Fillon leave the Elysee Palace in Paris following the last weekly cabinet meeting of France's President Nicolas Sarkozy's government, May 9, 2012. REUTERS/Philippe Wojazer (FRANCE - Tags: POLITICS) 

France's Junior Minister for Veterans' affairs Marc Laffineur (L), Foreign Trade Junior Minister Pierre Lellouche (2ndL), Solidarity and Social Cohesion Minister Roselyne Bachelot-Narquin (2ndR) and Prime Minister Francois Fillon leave the Elysee Palace in Paris following the last weekly cabinet meeting of France's President Nicolas Sarkozy's government, May 9, 2012. REUTERS/Philippe Wojazer (FRANCE - Tags: POLITICS)