U.S. Representative Julia Letlow leads the Louisiana Republican Senate primary field at 89 percent in current trader consensus after securing first place in the May 16 primary with roughly 45 percent of the vote. President Trump’s endorsement and active campaign against incumbent Senator Bill Cassidy drove Letlow’s strong performance, eliminating Cassidy from contention and advancing her alongside State Treasurer John Fleming into a June 27 runoff. Fleming’s second-place finish reflects his prior Trump administration ties and name recognition, though trailing Letlow by a wide margin in early results. The remaining candidates, including several listed below one percent, failed to advance under Louisiana’s jungle primary rules. Traders view Letlow’s path to the nomination as clear given the state’s Republican lean and her alignment with the Trump agenda heading into the runoff.