Sen. John Cornyn (R-Texas) has officially begun his bid to replace Sen. Mitch McConnell (R-Ky.) as the Senate Republican leader, becoming the first senator to enter the fray in what could be a fiercely competitive race.
Mr. McConnell, who has been the Senate Republican leader since 2007, announced on Feb. 28 that his leadership role in the upper chamber would reach its “sunset” in November, although he plans to remain in the Senate in a different role.