Democratic Senate candidate Jamie Harrison thanks his supporters at an election watch party in Columbia, S.C., after losing the Senate race to incumbent Lindsey Graham, Tuesday, Nov. 3, 2020. (Jeff Blake/The State via AP)

Republican Senate candidate Sen. Mitch McConnell, second from right, and his wife, Elaine Chao, right, look on as aides show him the election results in Louisville, Ky., Tuesday, Nov. 3, 2020. (AP Photo/Timothy D. Easley)

Sen. Steve Daines, R-Mont., celebrates with his family after his race was called by The Associated Press, early Wednesday, Nov. 4, 2020, in Bozeman, Mont. (AP Photo/Tommy Martino)

Republican Sen. Susan Collins, R-Maine, speaks on Wednesday, Nov. 4, 2020, in Bangor, Maine, after Tuesday's election. (AP Photo/Robert F. Bukaty)

Mark Kelly, right, Arizona Democratic candidate for U.S. Senate, waves to supporters along with his wife Gabrielle Giffords, second from right, and daughters, Claire Kelly, left, and Claudia Kelly, second from left, during an election night event Tuesday, Nov. 3, 2020 in Tucson, Ariz. (AP Photo/Ross D. Franklin)

Supporters pose with U.S. Sen. Lindsey Graham, center, following his victory speech after winning another term in office on Tuesday, Nov. 3, 2020, in Columbia, S.C. (AP Photo/Meg Kinnard)

Republican Senator-elect Tommy Tuberville throws toy footballs to supporters at his watch party at the Renaissance Hotel on Tuesday, Nov. 3, 2020, in Montgomery, Ala. (AP Photo/Butch Dill)

Republican U.S. Senate candidate Roger Marshall celebrates his win, at an election watch party in Topeka, Kan., Tuesday, Nov. 3, 2020. (AP Photo/Orlin Wagner)