Ranking Member Senator Gary Peters (D-MI) speaks during the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Mark Morgan, Chief Operating Officer and Senior Official Performing the Duties of the Commissioner, U.S. Customs and Border Protection, U.S. Department of Homeland Security, is seen before the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Mark Morgan, Chief Operating Officer and Senior Official Performing the Duties of the Commissioner, U.S. Customs and Border Protection, U.S. Department of Homeland Security, swears in at the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Sen. Jacky Rosen (D-NV) speaks during the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Mark Morgan, Chief Operating Officer and Senior Official Performing the Duties of the Commissioner, U.S. Customs and Border Protection, U.S. Department of Homeland Security, testifies during the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Mark Morgan, Chief Operating Officer and Senior Official Performing the Duties of the Commissioner, U.S. Customs and Border Protection, U.S. Department of Homeland Security, testifies during the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Mark Morgan, Chief Operating Officer and Senior Official Performing the Duties of the Commissioner, U.S. Customs and Border Protection, U.S. Department of Homeland Security, testifies during the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Chairman Ron Johnson (R-WI) talks with Mark Morgan, Chief Operating Officer and Senior Official Performing the Duties of the Commissioner, U.S. Customs and Border Protection, U.S. Department of Homeland Security, after the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Ranking Member Senator Gary Peters (D-MI) greets Mark Morgan, Chief Operating Officer and Senior Official Performing the Duties of the Commissioner, U.S. Customs and Border Protection, U.S. Department of Homeland Security, after the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Sen. Rick Scott (R-FL) speaks remotely during the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Sen. Rob Portman (R-OH) speaks remotely during the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Sen. James Lankford (R-OK) speaks during the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Sen. Mitt Romney (R-UT) speaks remotely during the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Sen. Mitt Romney (R-UT) speaks remotely during the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Mark Morgan, Chief Operating Officer and Senior Official Performing the Duties of the Commissioner, U.S. Customs and Border Protection, U.S. Department of Homeland Security, testifies during the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Mark Morgan, Chief Operating Officer and Senior Official Performing the Duties of the Commissioner, U.S. Customs and Border Protection, U.S. Department of Homeland Security, testifies during the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Ranking Member Senator Gary Peters (D-MI) attends the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Senator Kamala Harris (D-CA) attends the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Senator Maggie Hassan (D-NH) speaks during the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Chairman Ron Johnson (R-WI) conducts the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Mark Morgan, Chief Operating Officer and Senior Official Performing the Duties of the Commissioner, U.S. Customs and Border Protection, U.S. Department of Homeland Security, swears in at the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Mark Morgan, Chief Operating Officer and Senior Official Performing the Duties of the Commissioner, U.S. Customs and Border Protection, U.S. Department of Homeland Security, talks with Chairman Ron Johnson (R-WI) before the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Mark Morgan, Chief Operating Officer and Senior Official Performing the Duties of the Commissioner, U.S. Customs and Border Protection, U.S. Department of Homeland Security, stands before the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Chairman Ron Johnson (R-WI) prepares for the Senate Homeland Security and Governmental Affairs Committee hearing to examine Customs and Border Protection, focusing on evolving challenges facing the agency, in Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 25, 2020. Tom Williams/Pool via REUTERS

Sen. Lisa Murkowski (R-AK) attends a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Michael Reynolds/Pool via REUTERS

Democratic Senator from Virginia Tim Kaine attends a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Michael Reynolds/Pool via REUTERS

Republican Senator from Kansas Pat Roberts attends a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Sen. Susan Collins (R-ME) asks questions during a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Republican Senator from North Carolina Richard Burr speaks with a staffer at a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Michael Reynolds/Pool via REUTERS

Sen. Mike Braun (R-IN) listens to Sen. Robert Casey (D-PA) displayed on a screen during a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Sen. Susan Collins (R-ME) asks questions during a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Sen. Lisa Murkowski (R-AK) attends a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Sen. Lisa Murkowski (R-AK) attends a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

General view of a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Sen. Patty Murray (D-WA) is seen on a screen during a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Republican Senator from Kansas Pat Roberts (R) speaks with a staffer at the committee's hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Michael Reynolds/Pool via REUTERS

Merck Executive Vice President And Chief Patient Officer Julie Gerberding gives a remote opening statement during a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Merck Executive Vice President And Chief Patient Officer Julie Gerberding gives a remote opening statement during a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Former Secretary of Health and Human Services Mike Leavit gives a remote opening statement during a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Former Sen. William Frist (R-TN) gives a remote opening statement during a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Dr. Joneigh Khaldun, Chief Medical Executive and Chief Deputy Director for Health Michigan Department of Health and Human Services, gives a remote opening statement during a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Sen. Pat Roberts (R-KS) attends a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Sen. Susan Collins (R-ME) attends a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Sen. Tim Kaine (D-VA) attends a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Republican Senator from North Carolina Richard Burr attends a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Republican Senator from North Carolina Richard Burr takes off his face mask at a hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Michael Reynolds/Pool via REUTERS

Democratic Senator from Virginia Tim Kaine (L) speaks with U.S. Senate Health, Education, Labor, and Pensions Committee Chairman Lamar Alexander before the committee's hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Michael Reynolds/Pool via REUTERS

Chairman of the U.S. Senate Health, Education, Labor, and Pensions Committee Lamar Alexander attends his committee's hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Greg Nash/Pool via REUTERS

Chairman of the U.S. Senate Health, Education, Labor, and Pensions Committee Lamar Alexander attends his committee's hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Michael Reynolds/Pool via REUTERS

Chairman of the US Senate Health, Education, Labor, and Pensions Committee Lamar Alexander attends his committee's hearing to examine COVID-19, 'focusing on lessons learned to prepare for the next pandemic', on Capitol Hill in Washington, DC, U.S., June 23, 2020. Michael Reynolds/Pool via REUTERS

Josep Borrell, European Union foreign policy chief speaks at a news conference after a meeting of EU foreign ministers by videoconference at the European Council building in Brussels, Belgium June 15, 2020. The talks, which included a videoconference with U.S. Secretary of State Mike Pompeo, focused on China, developments in the Middle East and trans-Atlantic relations. Virginia Mayo/Pool via REUTERS

Josep Borrell, European Union foreign policy chief speaks at a news conference after a meeting of EU foreign ministers by videoconference at the European Council building in Brussels, Belgium June 15, 2020. The talks, which included a videoconference with U.S. Secretary of State Mike Pompeo, focused on China, developments in the Middle East and trans-Atlantic relations. Virginia Mayo/Pool via REUTERS

Josep Borrell, European Union foreign policy chief speaks at a news conference after a meeting of EU foreign ministers by videoconference at the European Council building in Brussels, Belgium June 15, 2020. The talks, which included a videoconference with U.S. Secretary of State Mike Pompeo, focused on China, developments in the Middle East and trans-Atlantic relations. Virginia Mayo/Pool via REUTERS

Josep Borrell, European Union foreign policy chief speaks at a news conference after a meeting of EU foreign ministers by videoconference at the European Council building in Brussels, Belgium June 15, 2020. The talks, which included a videoconference with U.S. Secretary of State Mike Pompeo, focused on China, developments in the Middle East and trans-Atlantic relations. Virginia Mayo/Pool via REUTERS

Josep Borrell, European Union foreign policy chief listens to questions at a news conference after a meeting of EU foreign ministers by videoconference at the European Council building in Brussels, Belgium June 15, 2020. The talks, which included a videoconference with U.S. Secretary of State Mike Pompeo, focused on China, developments in the Middle East and trans-Atlantic relations. Virginia Mayo/Pool via REUTERS

Josep Borrell, European Union foreign policy chief speaks during a news conference after a meeting of EU foreign ministers by videoconference at the European Council building in Brussels, Belgium June 15, 2020. The talks, which included a videoconference with U.S. Secretary of State Mike Pompeo, focused on China, developments in the Middle East and trans-Atlantic relations. Virginia Mayo/Pool via REUTERS

Senator Mazie Hirono (D-HI), seen through a tv screen attending remotely, asks a question at a Senate Judiciary Committee Hearing "to examine COVID-19 fraud, focusing on law enforcement's response to those exploiting the pandemic", as the outbreak of the coronavirus disease (COVID-19) continues, on Capitol Hill in Washington, U.S. June 9, 2020. Erin Schaff/The New York Times/Pool via REUTERS

Secret Service Assistant Director, Michael D'Ambrosio speaks during a Senate Judiciary Committee Hearing "to examine COVID-19 fraud, focusing on law enforcement's response to those exploiting the pandemic", as the outbreak of the coronavirus disease (COVID-19) continues, on Capitol Hill in Washington, U.S. June 9, 2020. Andrew Harnik/Pool via REUTERS

Sen. Sheldon Whitehouse, (D-RI), speaks during a Senate Judiciary Committee Hearing "to examine COVID-19 fraud, focusing on law enforcement's response to those exploiting the pandemic", as the outbreak of the coronavirus disease (COVID-19) continues, on Capitol Hill in Washington, U.S. June 9, 2020. Andrew Harnik/Pool via REUTERS

Sen. Amy Klobuchar,(D-MN), speaks via teleconference during a Senate Judiciary Committee Hearing "to examine COVID-19 fraud, focusing on law enforcement's response to those exploiting the pandemic", as the outbreak of the coronavirus disease (COVID-19) continues, on Capitol Hill in Washington, U.S. June 9, 2020. Andrew Harnik/Pool via REUTERS