With a pledge to fully back President Donald Trump’s agenda, Kentucky Republican Rep. Andy Barr on Tuesday jumped into the race to succeed retiring Sen. Mitch McConnell.

Republican U.S. Rep. Andy Barr launched a high-stakes Senate campaign Tuesday, opting to give up his seemingly secure House seat next year and enter the competitive contest to succeed longtime Sen. Mitch McConnell.

Andy Barr launched his campaign for Kentucky’s open Senate seat on Tuesday, looking to replace longtime Trump skeptic Mitch McConnell in the upper chamber. He joins Kentucky’s former attorney general, Daniel Cameron, in what could become a thorny GOP primary for a likely ruby red seat.