House Republicans earlier today elected McCarthy to serve as the new majority leader.
The leadership elections were called after current Majority Leader Eric Cantor, R-Va., suffered a stunning primary defeat last week. He'll step down from his leadership post on July 31.
Scalise took office in 2008.
He defeated Rep. Peter Roskam, R-Ill., the current Chief Deputy Whip and Rep. Marlin Stutzman, R-Ind.