Scalise serves as the House majority whip under Speaker Paul Ryan, who is not running for re-election, and has been mentioned as one of Ryan’s possible replacements if Republicans maintain control of the House. Four years ago, Scalise bested Roskam in the race for whip, a post that opened up in the leadership shuffle following Eric Cantor’s primary loss to Dave Brat in Virginia. Roskam was the No. 4 Republican in the House at the time, but his unsuccessful attempt to move up left him out of GOP leadership.