Rick Brattin leads the Missouri 5th Congressional District Republican primary market at 77.5% amid a crowded field of six candidates ahead of the August 4 vote. State Senator Brattin has secured endorsements from Governor Mike Kehoe, Club for Growth PAC, and multiple congressional Republicans, while outside groups have directed nearly all of their $2.8 million in spending toward Brattin and Taylor Burks. The newly redrawn district lines favor Republican prospects but remain subject to potential post-primary adjustments, creating uncertainty for all contenders. Burks trails at 15.5% despite comparable outside investment, with the remaining candidates—Micah Beebe, Brett Hueffmeier, Brad Patty, and Berton Knox—each under 4% as the contest narrows to a two-person dynamic.