Senate Minority Leader Mitch McConnellMitch McConnellIn House GOP, Ryan endorsement of Trump seen as inevitable McConnell: Trump White House will have ‘constraints’ Nearly 400 House bills stuck in Senate limbo MORE's (R-Ky.) Tea Party challenger has lost a top staffer with just one month to go before the Kentucky primary, according to a local radio station.
"Rachel has moved back to D.C. to pursue another career opportunity and is no longer with the campaign," Bevin spokeswoman Sarah Durand told WFPL. "The Bevin campaign is grateful for all she did for the team and wishes Rachel the best in her future endeavors."
Semmel left Rep. David SchweikertDavid SchweikertSenate races heating up Tea Party class reassesses record Lawmakers to DOD: Reject 'no touch' policy sought by 9/11 plotter MORE's (R-Ariz.) office last year to join Bevin's staff.
WFPL also reported at least two field operatives have also recently left Bevin's campaign.
The development is a setback for Bevin's campaign as he seeks to make up ground on McConnell, who has led by wide margins in the few public polls of the primary.