Incumbent senator faces a defining test as Trump-backed rival surges ahead in polls and prediction markets before the state's GOP primary.

Republican Sen. Bill Cassidy of Louisiana is fighting for his political life in Saturday’s primary against a challenger who has been endorsed by President Donald Trump

U.S. Senator Bill Cassidy, a Republican moderate targeted for retribution by President Donald Trump, will find out whether he can survive a primary election in Louisiana on Saturday against two popular rivals,

Sen. Bill Cassidy fights for political survival in Louisiana's GOP primary as Trump and allies back Rep. Julia Letlow to unseat the incumbent.

Sen. Bill Cassidy’s political career is at stake on Saturday as Louisiana voters weigh in on the Republican for the first time since he voted to convict President Donald Trump in his 2021 impeachment

The two-term incumbent is polling in third place in the GOP primary for his Louisiana Senate seat, as he faces a Trump-backed challenger.

Sen. Bill Cassidy of Louisiana, one of seven Republicans who voted to convict Trump in his 2021 impeachment trial, is in danger of losing his primary.

Louisiana voters will participate in a revamped and stripped-down state primary Saturday and decide the political fate of an embattled Republican U.S. senator targeted for defeat by President Donald T