White House Press Secretary Jen Psaki holds the first daily press briefing following new CDC guidance about gathering without masks, at the White House in Washington, U.S. May 14, 2021. REUTERS/Jonathan Ernst

White House Press Secretary Jen Psaki holds the first daily press briefing following new CDC guidance about gathering without masks, at the White House in Washington, U.S. May 14, 2021. REUTERS/Jonathan Ernst

White House Press Secretary Jen Psaki holds the first daily press briefing following new CDC guidance about gathering without masks, at the White House in Washington, U.S. May 14, 2021. REUTERS/Jonathan Ernst

White House Press Secretary Jen Psaki holds the first daily press briefing following new CDC guidance about gathering without masks, at the White House in Washington, U.S. May 14, 2021. REUTERS/Jonathan Ernst

White House Press Secretary Jen Psaki holds the daily press briefing at the White House in Washington, U.S. May 14, 2021. REUTERS/Jonathan Ernst

White House Council of Economic Advisers Chair Cecilia Rouse joins White House Press Secretary Jen Psaki for the daily press briefing at the White House in Washington, U.S. May 14, 2021. REUTERS/Jonathan Ernst

White House Council of Economic Advisers Chair Cecilia Rouse joins White House Press Secretary Jen Psaki for the daily press briefing at the White House in Washington, U.S. May 14, 2021. REUTERS/Jonathan Ernst

White House Press Secretary Jen Psaki holds the daily press briefing at the White House in Washington, U.S. May 14, 2021. REUTERS/Jonathan Ernst

White House Press Secretary Jen Psaki holds the daily press briefing at the White House in Washington, U.S. May 14, 2021. REUTERS/Jonathan Ernst

White House Press Secretary Jen Psaki holds the daily press briefing at the White House in Washington, U.S. May 14, 2021. REUTERS/Jonathan Ernst

Lawyer Kenji Utsunomiya shows off placards during a news conference after he and anti-Olympics petition organizer to submit a petition calling for the Tokyo 2020 Olympics to be cancelled to Tokyo Governor Yuriko Koike (not in picture) at the Tokyo Metropolitan Office press club in Tokyo, Japan May 14, 2021. REUTERS/Naoki Ogura

Lawyer Kenji Utsunomiya shows off a placard during a news conference after he and anti-Olympics petition organizer to submit a petition calling for the Tokyo 2020 Olympics to be cancelled to Tokyo Governor Yuriko Koike (not in picture) at the Tokyo Metropolitan Office press club in Tokyo, Japan May 14, 2021. REUTERS/Naoki Ogura

Lawyer Kenji Utsunomiya shows off placards as he attends a news conference after he and anti-Olympics petition organizer to submit a petition calling for the Tokyo 2020 Olympics to be cancelled to Tokyo Governor Yuriko Koike (not in picture) at the Tokyo Metropolitan Office press club in Tokyo, Japan May 14, 2021. REUTERS/Naoki Ogura

Senator Thom Tillis (R-NC) gets a kiss from service dog Morgan before a press conference in support of Puppies Assisting Wounded Service Members (PAWS) for Veterans Therapy Act, outside the United States Capitol in Washington, U.S., May 13, 2021. REUTERS/Evelyn Hockstein

Senator Thom Tillis (R-NC) pets service dog Morgan before a press conference in support of Puppies Assisting Wounded Service Members (PAWS) for Veterans Therapy Act, outside the United States Capitol in Washington, U.S., May 13, 2021. REUTERS/Evelyn Hockstein

Service dog Kaya Lyle stands with members of Congress and veterans at a press conference in support of Puppies Assisting Wounded Service Members (PAWS) for Veterans Therapy Act, outside the United States Capitol in Washington, U.S., May 13, 2021. REUTERS/Evelyn Hockstein

Wounded veteran Christopher Baity speaks at a press conference in support of Puppies Assisting Wounded Service Members (PAWS) for Veterans Therapy Act with service dog Phoenix by his side, outside the United States Capitol in Washington, U.S., May 13, 2021. REUTERS/Evelyn Hockstein

Senator Thom Tillis (R-NC) gets a kiss from service dog Morgan before a press conference in support of Puppies Assisting Wounded Service Members (PAWS) for Veterans Therapy Act, outside the United States Capitol in Washington, U.S., May 13, 2021. REUTERS/Evelyn Hockstein

Senator Steve Stivers (R-OH) gets a kiss from service dog Phoenix, after a press conference in support of Puppies Assisting Wounded Service Members (PAWS) for Veterans Therapy Act, outside the United States Capitol in Washington, U.S., May 13, 2021. REUTERS/Evelyn Hockstein TPX IMAGES OF THE DAY

White House Chief of Staff Ron Klain, Senior Advisor to the President Anita Dunn, Press Secretary Jen Psaki, and Communications Director Katherine Bedingfield stand without protective face masks in the Rose Garden of the White House in Washington, U.S., May 13, 2021. REUTERS/Kevin Lamarque

Secretary Antony Blinken and Australian Foreign Minister and Minister for Women Marise Payne hold a joint press availability at the U.S. State Department building in Washington, U.S., May 13, 2021. REUTERS/Leah Millis

Secretary Antony Blinken and Australian Foreign Minister and Minister for Women Marise Payne hold a joint press availability at the U.S. State Department building in Washington, U.S., May 13, 2021. REUTERS/Leah Millis

Secretary Antony Blinken and Australian Foreign Minister and Minister for Women Marise Payne hold a joint press availability at the U.S. State Department building in Washington, U.S., May 13, 2021. REUTERS/Leah Millis

Secretary Antony Blinken and Australian Foreign Minister and Minister for Women Marise Payne leave the room after holding a joint press availability at the U.S. State Department building in Washington, U.S., May 13, 2021. REUTERS/Leah Millis

Secretary Antony Blinken and Australian Foreign Minister and Minister for Women Marise Payne hold a joint press availability at the U.S. State Department building in Washington, U.S. May 13, 2021. REUTERS/Leah Millis

Secretary Antony Blinken and Australian Foreign Minister and Minister for Women Marise Payne hold a joint press availability at the U.S. State Department building in Washington, U.S., May 13, 2021. REUTERS/Leah Millis

Secretary Antony Blinken and Australian Foreign Minister and Minister for Women Marise Payne hold a joint press availability at the U.S. State Department building in Washington, U.S., May 13, 2021. REUTERS/Leah Millis

Secretary Antony Blinken holds a joint press availability with Australian Foreign Minister and Minister for Women Marise Payne, at the U.S. State Department building in Washington, U.S. May 13, 2021. REUTERS/Leah Millis

Secretary Antony Blinken and Australian Foreign Minister and Minister for Women Marise Payne hold a joint press availability at the U.S. State Department building in Washington, U.S., May 13, 2021. REUTERS/Leah Millis

Australian Foreign Minister and Minister for Women Marise Payne holds a joint press availability with Secretary Antony Blinken at the U.S. State Department building in Washington, U.S., May 13, 2021. REUTERS/Leah Millis

Secretary Antony Blinken and Australian Foreign Minister and Minister for Women Marise Payne hold a joint press availability at the U.S. State Department building in Washington, U.S., May 13, 2021. REUTERS/Leah Millis

Adrian de la Garza, candidate for governor in the state of Nuevo Leon for the Institutional Revolutionary Party (PRI), attends a press conference in Monterrey, Mexico May 13, 2021. REUTERS/Daniel Becerril

Adrian de la Garza, candidate for governor in the state of Nuevo Leon for the Institutional Revolutionary Party (PRI), attends a press conference in Monterrey, Mexico May 13, 2021. REUTERS/Daniel Becerril

Adrian de la Garza, candidate for governor in the state of Nuevo Leon for the Institutional Revolutionary Party (PRI), attends a press conference in Monterrey, Mexico May 13, 2021. REUTERS/Daniel Becerril

Adrian de la Garza, candidate for governor in the state of Nuevo Leon for the Institutional Revolutionary Party (PRI), attends a press conference in Monterrey, Mexico May 13, 2021. REUTERS/Daniel Becerril

Adrian de la Garza, candidate for governor in the state of Nuevo Leon for the Institutional Revolutionary Party (PRI), attends a press conference in Monterrey, Mexico May 13, 2021. REUTERS/Daniel Becerril

Adrian de la Garza, candidate for governor in the state of Nuevo Leon for the Institutional Revolutionary Party (PRI), attends a press conference in Monterrey, Mexico May 13, 2021. REUTERS/Daniel Becerril

White House Chief of Staff Ron Klain, Senior Advisor to the President Anita Dunn, Press Secretary Jen Psaki, Communications Director Katherine Bedingfield and other staff members stand without protective face masks in the Rose Garden of the White House in Washington, U.S., May 13, 2021. REUTERS/Kevin Lamarque

White House Press Secretary Jen Psaki and Communications Director Katherine Bedingfield laugh without protective face masks at the Rose Garden of the White House in Washington, U.S., May 13, 2021. REUTERS/Kevin Lamarque

White House Chief of Staff Ron Klain, Press Secretary Jen Psaki and Communications Director Kate Bedingfield are seen without protective face masks in the Rose Garden of the White House in Washington, U.S., May 13, 2021. REUTERS/Kevin Lamarque

White House Press Secretary Jen Psaki and Communications Director Kate Bedingfield are seen without protective face masks in the Rose Garden of the White House in Washington, U.S., May 13, 2021. REUTERS/Kevin Lamarque

House Speaker Nancy Pelosi (D-CA), holds her weekly press conference in the United States Capitol in Washington, U.S., May 13, 2021. REUTERS/Evelyn Hockstein

House Speaker Nancy Pelosi (D-CA), holds her weekly press conference in the United States Capitol in Washington, U.S., May 13, 2021. REUTERS/Evelyn Hockstein

House Speaker Nancy Pelosi (D-CA), holds her weekly press conference in the United States Capitol in Washington, U.S., May 13, 2021. REUTERS/Evelyn Hockstein

House Speaker Nancy Pelosi (D-CA), holds her weekly press conference in the United States Capitol in Washington, U.S., May 13, 2021. REUTERS/Evelyn Hockstein

House Speaker Nancy Pelosi (D-CA), holds her weekly press conference in the United States Capitol in Washington, U.S., May 13, 2021. REUTERS/Evelyn Hockstein

House Speaker Nancy Pelosi (D-CA), holds her weekly press conference in the United States Capitol in Washington, U.S., May 13, 2021. REUTERS/Evelyn Hockstein

House Speaker Nancy Pelosi (D-CA), holds her weekly press conference in the United States Capitol in Washington, U.S., May 13, 2021. REUTERS/Evelyn Hockstein

U.S. Representative Liz Cheney (R-WY), speaks to the press after her removal as chair of the House Republican Conference, at the U.S. Capitol in Washington, U.S., May 12, 2021. REUTERS/Evelyn Hockstein

U.S. Environmental Protection Agency Administrator Michael Regan speaks with Transportation Secretary Pete Buttigieg at his side during a press briefing about the administration's response to the Colonial Pipeline cyberattack shut down at the White House in Washington, U.S., May 12, 2021. REUTERS/Kevin Lamarque

U.S. Environmental Protection Agency Administrator Michael Regan listens during a press briefing about the administration's response to the Colonial Pipeline cyberattack shut down at the White House in Washington, U.S., May 12, 2021. REUTERS/Kevin Lamarque

U.S. Transportation Secretary Pete Buttigieg takes a question during a press briefing about the administration's response to the Colonial Pipeline cyberattack shut down at the White House in Washington, U.S., May 12, 2021. REUTERS/Kevin Lamarque

U.S. Transport Secretary Pete Buttigieg and Environmental Protection Agency Administrator Michael Regan take a question during a press briefing about the administration's response to the Colonial Pipeline cyberattack shut down at the White House in Washington, U.S., May 12, 2021. REUTERS/Kevin Lamarque

Iran's Foreign Minister Mohammad Javad Zarif talks to the press after meeting with Syrian Foreign Minister Faisal al Mekdad, in Damascus, Syria May 12, 2021. REUTERS/Firas Makdesi

German Minister for Education and Research Anja Karliczek and Health Minister Jens Spahn arrive for a press conference on the situation of COVID-19 pandemic in the country, in Berlin, Germany May 12, 2021. Tobias Schwarz/Pool via REUTERS

German Minister for Education and Research Anja Karliczek (R) and German Health Minister Jens Spahn arrive for a press conference on the situation of COVID-19 pandemic in the country, in Berlin, Germany May 12, 2021. Tobias Schwarz/Pool via REUTERS

German Minister for Education and Research Anja Karliczek attends a press conference on the situation of COVID-19 pandemic in the country, in Berlin, Germany May 12, 2021. Tobias Schwarz/Pool via REUTERS

German Health Minister Jens Spahn attends a press conference on the situation of COVID-19 pandemic in the country, in Berlin, Germany May 12, 2021. Tobias Schwarz/Pool via REUTERS

Lothar Wieler, head of Germany's Robert Koch Institute (RKI) for disease control attends a press conference on the situation of COVID-19 pandemic in the country, in Berlin, Germany May 12, 2021. Tobias Schwarz/Pool via REUTERS