Former U.S. Capitol Police Chief Steven Sund testifies before a Senate Homeland Security and Governmental Affairs & Senate Rules and Administration joint hearing on Capitol Hill, Washington, Tuesday, Feb. 23, 2021, to examine the January 6th attack on the Capitol. (Erin Scott/The New York Times via AP, Pool)

Sen. Jon Ossoff, D-Ga., questions former U.S. Capitol Police Chief Steven Sund, foreground, during a Senate Homeland Security and Governmental Affairs & Senate Rules and Administration joint hearing on Capitol Hill, Washington, Tuesday, Feb. 23, 2021, to examine the January 6th attack on the Capitol. (AP Photo/Andrew Harnik, Pool)

Chairwoman Sen. Amy Klobuchar, D-Minn., left, speaks with former U.S. Capitol Police Chief Steven Sund, right, following a Senate Homeland Security and Governmental Affairs & Senate Rules and Administration joint hearing on Capitol Hill, Washington, Tuesday, Feb. 23, 2021, to examine the January 6th attack on the Capitol. (AP Photo/Andrew Harnik, Pool)

Former U.S. Capitol Police Chief Steven Sund testifies before a Senate Homeland Security and Governmental Affairs & Senate Rules and Administration joint hearing on Capitol Hill, Washington, Tuesday, Feb. 23, 2021, to examine the January 6th attack on the Capitol. (Erin Scott/The New York Times via AP, Pool)

Former U.S. Capitol Police Chief Steven Sund, right, hugs Capitol Police Captain Carneysha Mendoza, left, before they testify before a Senate Homeland Security and Governmental Affairs & Senate Rules and Administration joint hearing on Capitol Hill, Washington, Tuesday, Feb. 23, 2021, to examine the January 6th attack on the Capitol. (AP Photo/Andrew Harnik, Pool)

Former U.S. Capitol Police Chief Steven Sund testifies before a Senate Homeland Security and Governmental Affairs & Senate Rules and Administration joint hearing on Capitol Hill, Washington, Tuesday, Feb. 23, 2021, to examine the January 6th attack on the Capitol. (AP Photo/Andrew Harnik, Pool)

Washington Metropolitan Police Department Acting Chief of Police Robert Contee III, left, testifies via teleconference before a Senate Homeland Security and Governmental Affairs & Senate Rules and Administration joint hearing on Capitol Hill, Washington, Tuesday, Feb. 23, 2021, to examine the January 6th attack on the Capitol. (AP Photo/Andrew Harnik, Pool)

Former U.S. Capitol Police Chief Steven Sund, left, speaks with Chairwoman Sen. Amy Klobuchar, D-Minn., right, before he testifies before a Senate Homeland Security and Governmental Affairs & Senate Rules and Administration joint hearing on Capitol Hill, Washington, Tuesday, Feb. 23, 2021, to examine the January 6th attack on the Capitol. (AP Photo/Andrew Harnik, Pool)

Chairman Sen. Gary Peters., D-Mich., speaks during a Senate Homeland Security and Governmental Affairs & Senate Rules and Administration joint hearing on Capitol Hill, Washington, Tuesday, Feb. 23, 2021, to examine the January 6th attack on the Capitol. (Erin Scott/The New York Times via AP, Pool)