U.S. Sen. Lindsey Graham faces off in the South Carolina U.S. Senate debate with challenger Jaime Harrison at Allen University in Columbia, S.C., Saturday, Oct. 3, 2020. (Joshua Boucher/The State via AP)

FILE - In this Wednesday, Sept. 30, 2020, file photo, Sen. Lindsey Graham, R-S.C., appears before a Senate Judiciary Committee hearing on Capitol Hill in Washington, to examine the FBI "Crossfire Hurricane" investigation. Senate Judiciary Committee Chairman Graham, once a biting critic of President Donald Trump, the three-term South Carolina Republican on Monday, Oct. 12, 2020, opens the confirmation hearings for Judge Amy Coney Barrett, just three weeks before Election Day. (Stefani Reynolds/Pool Photo via AP, File)

FILE - In this June 9, 2020, file photo Chairman Sen. Lindsey Graham, R-S.C., speaks during a Senate Judiciary Committee hearing on Capitol Hill in Washington. Hearings before the Republican-led Senate Judiciary Committee will begin Monday, Oct. 12, for President Donald Trump’s Supreme Court nominee Judge Amy Coney Barrett. (AP Photo/Andrew Harnik, Pool, File)