For those keeping score, there are now 10 incumbent senators who are preparing to give up their seats next year, including five Republicans: Tennesseeās Marsha Blackburn (whoās running for governor), Ernst, Kentuckyās Mitch McConnell, North Carolinaās Thom Tillis and Alabamaās Tommy Tuberville (whoās also running for governor in that state).
Among Democrats, four incumbent senators are retiring ā Illinoisā Dick Durbin, Michiganās Gary Peters, New Hampshireās Jeanne Shaheen and Minnesotaās Tina Smith ā while Coloradoās Michael Bennet, whoās midway through his term, is running for governor with plans to appoint his own successor.