Mark Kelly, Arizona Democratic candidate for U.S. Senate, gestures as he speaks at an election night event Tuesday, Nov. 3, 2020 in Tucson, Ariz. (AP Photo/Ross D. Franklin)

Mark Kelly, Arizona Democratic candidate for U.S. Senate, waves to supporters as he speaks during an election night event Tuesday, Nov. 3, 2020 in Tucson, Ariz. (AP Photo/Ross D. Franklin)

U.S. Sen. Martha McSally, R-Ariz., walks her dog Boomer to greet voters at a polling station early, Tuesday, Nov. 3, 2020, in Mesa, Ariz. (AP Photo/Matt York)

Arizona Republican Sen. Martha McSally campaigns at Republican Party Headquarters Monday, Nov. 2, 2020, in Phoenix. McSally is running against Democratic candidate Mark Kelly in the election set for tomorrow. (AP Photo/Ross D. Franklin)

Mark Kelly, Democratic candidate for the U.S. Senate, greets voters at a polling station, Tuesday, Nov. 3, 2020, in Phoenix. Kelly is seeking to unseat incumbent Martha McSally. (AP Photo/Matt York)