A screen shows an image of Kazakh President and candidate Kassym-Jomart Tokayev, which is part of his campaign ahead of the upcoming presidential election, in Almaty, Kazakhstan June 3, 2019. REUTERS/Pavel Mikheyev 

A screen shows an image of Kazakh President and candidate Kassym-Jomart Tokayev, which is part of his campaign ahead of the upcoming presidential election, in Almaty, Kazakhstan June 3, 2019. REUTERS/Pavel Mikheyev 

Brazil's Minister of the Secretariat of Government Santos Cruz is seen before a ceremony for the presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado 

Brazil's President Jair Bolsonaro and Economy Minister Paulo Guedes attend a ceremony for the presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado 

Brazil's President Jair Bolsonaro gestures during a ceremony for the presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado 

Brazil's President Jair Bolsonaro attends a ceremony for the presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado 

Brazil's Justice Minister Sergio Moro is seen before ceremony for the presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado 

Brazil's President Jair Bolsonaro attends a ceremony for the presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado 

Brazil's President Jair Bolsonaro attends a ceremony for the presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado 

Brazil's President Jair Bolsonaro listens to Chief of Staff Minister Onyx Lorenzoni during a ceremony to presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado 

Brazil's Secretary of Social Security Rogerio Marinho is seen before ceremony to presentation of the 2nd phase of the advertising campaign of the pension reform bill at the Planalto Palace in Brasilia, Brazil May 20, 2019. REUTERS/Adriano Machado 

U.S. Rep. Alexandria Ocasio-Cortez (D-NY) presides over the U.S. House of Representatives inside the House Chamber in this still image taken from video on Capitol Hill in Washington, U.S., May 10, 2019. U.S. House TV/Handout via Reuters ATTENTION EDITORS - EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS 

U.S. Rep. Alexandria Ocasio-Cortez (D-NY) presides over the U.S. House of Representatives inside the House Chamber in this still image taken from video on Capitol Hill in Washington, U.S., May 10, 2019. U.S. House TV/Handout via Reuters ATTENTION EDITORS - EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS 

U.S. Rep. Alexandria Ocasio-Cortez (D-NY) presides over the U.S. House of Representatives inside the House Chamber in this still image taken from video on Capitol Hill in Washington, U.S., May 10, 2019. U.S. House TV/Handout via Reuters ATTENTION EDITORS - EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS 

A billboard advertising "Eva's Stories", a social media project by Israeli entrepreneurs telling the imagined documentary of the final months of Eva Heyman, a Jewish teenager who was murdered by the Nazis during the Holocaust, is seen in Tel Aviv, Israel April 30, 2019. REUTERS/Amir Cohen 

A billboard advertising "Eva's Stories", a social media project by Israeli entrepreneurs telling the imagined documentary of the final months of Eva Heyman, a Jewish teenager who was murdered by the Nazis during the Holocaust, is seen in Tel Aviv, Israel April 30, 2019. REUTERS/Amir Cohen 

Britain's opposition Labour Party leader, Jeremy Corbyn speaks in Parliament in London, Britain, February 13, 2019, in this screen grab taken from video. Parliament TV/Handout via REUTERS FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS 

Soccer Football - Premier League - Brighton & Hove Albion v Crystal Palace - The American Express Community Stadium, Brighton, Britain - December 4, 2018 General view as the advertising boards are in colours in support of the Stonewall Rainbow Laces campaign REUTERS/Toby Melville EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details. 

Soccer Football - Premier League - Brighton & Hove Albion v Crystal Palace - The American Express Community Stadium, Brighton, Britain - December 4, 2018 General view as the advertising boards display a message in support of the Stonewall Rainbow Laces campaign REUTERS/Toby Melville EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details. 

The front of a four page wraparound advertisement by Philip Morris calling on people to quit smoking for 30 days is seen on the front page of the daily Mirror in London, Britain, October 22, 2018. REUTERS/Andrew Winning 

German Minister for Family, Pensioners and Youth Franziska Giffey holds an advertising campaign block for a Kindergarden law at the weekly cabinet while in Berlin, Germany, September 19, 2018. REUTERS/Fabrizio Bensch 

A man tears an advertising campaign featuring leftist front-runner Andres Manuel Lopez Obrador (L) of the National Regeneration Movement (MORENA) alongside Latin American leaders Hugo Chavez and Lula in Mexico City, Mexico April 25, 2018. REUTERS/Ginnette Riquelme 

A man walks by a bus featuring an advertising campaign with leftist front-runner Andres Manuel Lopez Obrador (L) of the National Regeneration Movement (MORENA) alongside Latin American leaders Hugo Chavez and Lula in Mexico City, Mexico April 25, 2018. REUTERS/Ginnette Riquelme 

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas stand with activists as they pose at the launch of the Peoples Vote advertising campaign in central London, Britain April 15, 2018. REUTERS/Simon Dawson 

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas pose in front of a poster to launch the Peoples Vote advertising campaign in London, Britain April 15, 2018. REUTERS/Simon Dawson 

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas stand with activists as they pose at the launch of the Peoples Vote advertising campaign in central London, Britain April 15, 2018. REUTERS/Simon Dawson 

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas pose in front of a poster to launch the Peoples Vote advertising campaign in London, Britain April 15, 2018. REUTERS/Simon Dawson 

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas pose in front of a poster to launch the Peoples Vote advertising campaign in London, Britain, April 15, 2018. REUTERS/Simon Dawson 

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas stand with activists as they pose at the launch of the Peoples Vote advertising campaign in central London, Britain April 15, 2018. REUTERS/Simon Dawson 

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas pose in front of a poster to launch the Peoples Vote advertising campaign in London, Britain, April 15, 2018. REUTERS/Simon Dawson 

Labour Party MP Chuka Umunna, Liberal Democrat MP Layla Moran and Green MP Caroline Lucas stand with activists as they pose at the launch of the Peoples Vote advertising campaign in London, Britain, April 15, 2018. REUTERS/Simon Dawson 

Buses drive past a board, which advertises the campaign of candidate in the upcoming presidential election Ksenia Sobchak, in a street in Krasnoyarsk, Russia March 12, 2018. REUTERS/Ilya Naymushin 

Cars drive past a billboard advertising the campaign of Pavel Grudinin, candidate of the Russian Communist Party in the upcoming presidential election, in Krasnoyarsk, Russia March 11, 2018. REUTERS/Ilya Naymushin 

A multi-sided transformable board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, is on display in a street in Stavropol, Russia March 5, 2018. REUTERS/Eduard Korniyenko TPX IMAGES OF THE DAY 

A multi-sided transformable board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, is on display in a street in Stavropol, Russia March 5, 2018. REUTERS/Eduard Korniyenko 

A multi-sided transformable board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, is on display in a street in Stavropol, Russia March 5, 2018. REUTERS/Eduard Korniyenko 

A man smokes while walking near a board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, in a street in Stavropol, Russia March 5, 2018. The board reads "Stavropol is for strong Russia!" REUTERS/Eduard Korniyenko 

A driver looks out of a bus near a board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, in a street in Stavropol, Russia March 5, 2018. REUTERS/Eduard Korniyenko 

Boards, which advertise the campaign of candidates in the upcoming presidential election Pavel Grudinin (L) and Vladimir Zhirinovsky (2nd L), are on display near a road outside Stavropol, Russia March 4, 2018. REUTERS/Eduard Korniyenko 

Cars drive along a road past a board, which advertises the campaign of leader of the Liberal Democratic Party of Russia and presidential candidate Vladimir Zhirinovsky, in the Siberian village of Mansky outside Krasnoyarsk, Russia February 22, 2018. REUTERS/Ilya Naymushin 

People walk near a multi-sided transformable board, which advertises the campaign of Russian TV personality and presidential candidate Ksenia Sobchak, on a street in St. Petersburg, Russia February 19, 2018. REUTERS/Anton Vaganov 

Cars drive near a multi-sided transformable board, which advertises the campaign of Russian TV personality and presidential candidate Ksenia Sobchak, on a street in St. Petersburg, Russia February 19, 2018. REUTERS/Anton Vaganov 

People walk near a multi-sided transformable board, which advertises the campaign of Russian TV personality and presidential candidate Ksenia Sobchak, on a street in St. Petersburg, Russia February 19, 2018. REUTERS/Anton Vaganov 

A police officer stands near a board, which advertises the campaign of Russian TV personality and presidential candidate Ksenia Sobchak, in a street in St. Petersburg, Russia February 19, 2018. REUTERS/Anton Vaganov 

People ride a tram past a board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, on a street in St. Petersburg, Russia February 19, 2018. REUTERS/Anton Vaganov TPX IMAGES OF THE DAY 

A historical Soviet artillery gun is seen in front of a board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, at a World War Two memorial in St. Petersburg, Russia February 19, 2018. REUTERS/Anton Vaganov 

A multi-sided transformable board, which advertises the campaign of Russian TV personality and presidential candidate Ksenia Sobchak, is on display on a street in St. Petersburg, Russia February 19, 2018. REUTERS/Anton Vaganov 

A man walks near a board, which advertises the campaign of Russian TV personality and presidential candidate Ksenia Sobchak, on a street in St. Petersburg, Russia February 19, 2018. REUTERS/Anton Vaganov 

People ride a tram past a board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, on a street in St. Petersburg, Russia February 19, 2018. REUTERS/Anton Vaganov 

A multi-sided transformable board, which advertises the campaign of Russian TV personality and presidential candidate Ksenia Sobchak, is on display on a street in St. Petersburg, Russia February 19, 2018. REUTERS/Anton Vaganov 

People walk near a board, which advertises the campaign of Russian TV personality and presidential candidate Ksenia Sobchak, in a street in St. Petersburg, Russia February 18, 2018. REUTERS/Anton Vaganov 

People with a dog walk near a board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, in a street in Stavropol, Russia February 9, 2018. The inscription on the board reads "March 18, 2018. Strong President. Strong Russia!" REUTERS/Eduard Korniyenko 

People walk near a board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, in a street in the southern city of Stavropol, Russia February 6, 2018. REUTERS/Eduard Korniyenko 

People walk near a board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, in a street in Stavropol, Russia February 5, 2018. REUTERS/Eduard Korniyenko 

A multi-sided transformable board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, is on display in a street in Stavropol, Russia February 5, 2018. REUTERS/Eduard Korniyenko 

A woman walks past a board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, in a street in Tula, south of Moscow, Russia January 26, 2018. REUTERS/Maxim Shemetov 

A girl walks past a board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, in a street in Tula, south of Moscow, Russia January 26, 2018. REUTERS/Maxim Shemetov 

Men walk past a board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, in a street in Tula, south of Moscow, Russia January 26, 2018. REUTERS/Maxim Shemetov 

Women talk near a board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, in a street in Tula, south of Moscow, Russia January 26, 2018. REUTERS/Maxim Shemetov 

A man puts his belongings into a car near a board, which advertises the campaign of Russian President Vladimir Putin ahead of the upcoming presidential election, in a street in Stavropol, Russia January 20, 2018. REUTERS/Eduard Korniyenko