Louisiana Treasurer John Fleming and U.S. Rep. Julia Letlow will face each other in a June 27 runoff for the Republican Senate nomination in Louisiana. The two failed to reach the 50% threshold to win outright but succeeded in their efforts to dislodge U.S. Sen. Bill Cassidy, who finished third.

Sen. Bill Cassidy (R-La.) was projected to fail to advance to the runoff in Louisiana’s GOP Senate primary Saturday, according to Decision Desk HQ, ending the incumbent senator’s reelection bid after years of political fallout from his vote to convict President Trump following the Jan. 6, 2021, Capitol attack. Trump-endorsed Rep. Julia Letlow (R-La.) and...