Former Rep. John Fleming, now the Louisiana state treasurer, on Wednesday launched a 2026 primary challenge to Sen. Bill Cassidy, a fellow Republican who voted to convict Donald Trump at his second impeachment trial.

Fleming, a retired family doctor from Minden, represented northwest Louisiana in the U.S. House from 2009-17, giving up his seat in 2016 to make a failed run for a U.S. Senate seat won by then-Treasurer John Kennedy. Fleming went on to hold several senior positions in the Trump administration and was elected treasurer in 2023.

Louisiana State Treasurer John Fleming (R) will challenge Sen. Bill Cassidy (R-La.) in the 2026 Louisiana Senate race, he announced Wednesday, after initially signaling last month he was likely to

Louisiana State Treasurer John Fleming has announced his run for the U.S. Senate, directly challenging incumbent Senator Bill Cassidy and critiquing his record. The announcement has sparked sharp rebuttals from Cassidy's camp.

Treasury Secretary John Fleming announced Wednesday he is beginning a campaign to unseat U.S. Sen. Bill Cassidy when he’s up for reelection in two years.