Military musicians perform in the Grand Foyer during a press preview of holiday decor at the White House in Washington, U.S., November 30, 2020. REUTERS/Kevin Lamarque

A woman walks through the Cross Hall of the White House during a holiday decoration press preview in Washington, U.S., November 30, 2020. REUTERS/Kevin Lamarque

The Cross Hall of the White House is adorned with holiday decorations during a press preview in Washington, U.S., November 30, 2020. REUTERS/Kevin Lamarque

A gingerbread White House adorns the State Dining Room during a holiday decoration press preview at the White House in Washington, U.S., November 30, 2020. REUTERS/Kevin Lamarque

The Blue Room of the White House is adorned with holiday decorations during a press preview in Washington, U.S., November 30, 2020. REUTERS/Kevin Lamarque

The Red Room of the White House is adorned with holiday decorations during a press preview in Washington, U.S., November 30, 2020. REUTERS/Kevin Lamarque

The Cross Hall of the White House is adorned with holiday decorations during a press preview in Washington, U.S., November 30, 2020. REUTERS/Kevin Lamarque

The Red Room of the White House is adorned with holiday decorations during a press preview in Washington, U.S., November 30, 2020. REUTERS/Kevin Lamarque

The East Room of the White House is adorned with holiday decorations during a press preview in Washington, U.S., November 30, 2020. REUTERS/Kevin Lamarque

A military social aide tends his post during a press preview of holiday decorations at the White House in Washington, U.S., November 30, 2020. REUTERS/Kevin Lamarque

Photographers walk in the East Room during a press preview of holiday decorations at the White House in Washington, U.S., November 30, 2020. REUTERS/Kevin Lamarque

Nigerian Minister of Humanitarian Affairs, Disaster Management and Social Development, Sadiya Umar Farouq, wearing a face mask, attends a ministerial press briefing in Abuja, Nigeria November 30, 2020. REUTERS/Afolabi Sotunde

U.S. President Donald Trump arrives to speak to reporters in the Brady Press Briefing Room at the White House in Washington, U.S., November 24, 2020. REUTERS/Hannah McKay

A man holds the presidential seal following a U.S. President Donald Trump's news conference in the Brady Press Briefing Room at the White House in Washington, U.S., November 24, 2020. REUTERS/Hannah McKay

A person hangs the presidential seal ahead of a U.S. President Donald Trump's news conference in the Brady Press Briefing Room at the White House in Washington, U.S., November 24, 2020. REUTERS/Hannah McKay

U.S. President Donald Trump touts recent U.S. stock market gains during a brief appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 24, 2020. REUTERS/Hannah McKay

U.S. President Donald Trump arrives to speak to reporters in the Brady Press Briefing Room at the White House in Washington, U.S., November 24, 2020. REUTERS/Hannah McKay

U.S. President Donald Trump departs after touting recent U.S. stock market gains during a brief appearance before reporters in the Brady Press Briefing Room at the White House in Washington, U.S., November 24, 2020. REUTERS/Hannah McKay

U.S. President Donald Trump touts recent U.S. stock market gains during a brief appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 24, 2020. REUTERS/Hannah McKay

U.S. President Donald Trump touts recent U.S. stock market gains during a brief appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 24, 2020. REUTERS/Hannah McKay

U.S. President Donald Trump arrives to speak to reporters in the Brady Press Briefing Room at the White House in Washington, U.S., November 24, 2020. REUTERS/Hannah McKay

U.S. President Donald Trump arrives to speak to reporters in the Brady Press Briefing Room at the White House in Washington, U.S., November 24, 2020. REUTERS/Hannah McKay

U.S. President Donald Trump arrives to speak to reporters in the Brady Press Briefing Room at the White House in Washington, U.S., November 24, 2020. REUTERS/Hannah McKay

U.S. President Donald Trump touts recent U.S. stock market gains during a brief appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 24, 2020. REUTERS/Hannah McKay

Two turkeys, who will serve as the National Thanksgiving Turkey and alternate, are seen ahead of the 73rd annual National Turkey presentation prior to a press event to introduce them in Washington, U.S., November 23, 2020. REUTERS/Hannah McKay

Two turkeys, who will serve as the National Thanksgiving Turkey and alternate, are seen in a hotel room ahead of the 73rd annual National Turkey presentation prior to a press event to introduce them in Washington, U.S., November 23, 2020. REUTERS/Hannah McKay

Two turkeys, who will serve as the National Thanksgiving Turkey and alternate, are seen in a hotel room ahead of the 73rd annual National Turkey presentation prior to a press event to introduce them in Washington, U.S., November 23, 2020. REUTERS/Hannah McKay

Two turkeys, who will serve as the National Thanksgiving Turkey and alternate, are seen in a hotel room ahead of the 73rd annual National Turkey presentation prior to a press event to introduce them in Washington, U.S., November 23, 2020. REUTERS/Hannah McKay

Two turkeys, who will serve as the National Thanksgiving Turkey and alternate, are seen in a hotel room ahead of the 73rd annual National Turkey presentation prior to a press event to introduce them in Washington, U.S., November 23, 2020. REUTERS/Hannah McKay

Two turkeys, who will serve as the National Thanksgiving Turkey and alternate, are seen in a hotel room ahead of the 73rd annual National Turkey presentation prior to a press event to introduce them in Washington, U.S., November 23, 2020. REUTERS/Hannah McKay TPX IMAGES OF THE DAY

A turkey, one of two finalists who will serve as the National Thanksgiving Turkey and alternate, is seen in a hotel room ahead of the 73rd annual National Turkey presentation prior to a press event to introduce them in Washington, U.S., November 23, 2020. REUTERS/Hannah McKay

Two turkeys, who will serve as the National Thanksgiving Turkey and alternate, are seen in a hotel room ahead of the 73rd annual National Turkey presentation prior to a press event to introduce them in Washington, U.S., November 23, 2020. REUTERS/Hannah McKay

EU Commissioner for Environment and Oceans Virginijus Sinkevicius adjusts his mask during a press conference on air quality in Europe at the European headquarters in Brussels, Belgium November 23, 2020. Kenzo Tribouillard/Pool via REUTERS

EU Commissioner for Environment and Oceans Virginijus Sinkevicius gives a press conference on air quality in Europe at the European headquarters in Brussels, Belgium November 23, 2020. Kenzo Tribouillard/Pool via REUTERS

EU Commissioner for Environment and Oceans Virginijus Sinkevicius gives a press conference on air quality in Europe at the European headquarters in Brussels, Belgium November 23, 2020. Kenzo Tribouillard/Pool via REUTERS

EU Commissioner for Environment and Oceans Virginijus Sinkevicius gives a press conference on air quality in Europe at the European headquarters in Brussels, Belgium November 23, 2020. Kenzo Tribouillard/Pool via REUTERS

EU Commissioner for Environment and Oceans Virginijus Sinkevicius gives a press conference on air quality in Europe at the European headquarters in Brussels, Belgium November 23, 2020. Kenzo Tribouillard/Pool via REUTERS

EU Commissioner for Environment and Oceans Virginijus Sinkevicius gives a press conference on air quality in Europe at the European headquarters in Brussels, Belgium November 23, 2020. Kenzo Tribouillard/Pool via REUTERS

EU Commissioner for Environment and Oceans Virginijus Sinkevicius gives a press conference on air quality in Europe at the European headquarters in Brussels, Belgium November 23, 2020. Kenzo Tribouillard/Pool via REUTERS

Head of Ile-de-France Regional Health Agency (ARS) Aurelien Rousseau, French Education, Youth and Sports Minister Jean-Michel Blanquer and Director General of Assistance Publique-Hopitaux de Paris (AP-HP) Martin Hirsch speak to the press during their visit to the Emile Dubois Lycee where antigen testing for the coronavirus disease (COVID-19) is taking place, in Paris, France November 23, 2020. Ludovic Marin/Pool via REUTERS

Head of Ile-de-France Regional Health Agency (ARS) Aurelien Rousseau, French Education, Youth and Sports Minister Jean-Michel Blanquer and Director General of Assistance Publique-Hopitaux de Paris (AP-HP) Martin Hirsch speak to the press during their visit to the Emile Dubois Lycee where antigen testing for the coronavirus disease (COVID-19) is taking place, in Paris, France November 23, 2020. Ludovic Marin/Pool via REUTERS

U.S. President Donald Trump listens as HHS Secretary Alex Azar speaks about prescription drug prices in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump is followed by HHS Secretary Alex Azar as he arrives to speak about prescription drug prices during an appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump is followed by HHS Secretary Alex Azar as he arrives to speak about prescription drug prices during an appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump is followed by HHS Secretary Alex Azar as he arrives to speak about prescription drug prices during an appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump arrives to speak about prescription drug prices during an appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump speaks about prescription drug prices during an appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump is followed by Health and Human Services (HHS) Secretary Alex Azar as he arrives to speak about prescription drug prices in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump speaks about prescription drug prices during an appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump steps away from the podium as Health and Human Services (HHS) Secretary Alex Azar arrives to speak about prescription drug prices in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump arrives at the podium to speak about prescription drug prices during an appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump arrives at the podium to speak about prescription drug prices during an appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump listens to administration officials after speaking about prescription drug prices during an appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump is seen as he arrives to speak about prescription drug prices during an appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump steps away from the podium as he speaks about prescription drug prices during an appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump steps away from the podium as he speaks about prescription drug prices during an appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump leaves the podium after speaking about prescription drug prices during an appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump steps away from the podium as he speaks about prescription drug prices during an appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria

U.S. President Donald Trump speaks about prescription drug prices during an appearance in the Brady Press Briefing Room at the White House in Washington, U.S., November 20, 2020. REUTERS/Carlos Barria