Donald Trump backed a challenger to unseat Bill Cassidy, seen as revenge for Cassidy's vote in the second Trump impeachment.

The senator lost his primary in Louisiana Saturday night, five years after voting to convict Trump on impeachment charges ...

Incumbent Sen. Bill Cassidy lost the GOP Senate primary in Louisiana to a Trump-backed candidate after voting against Trump ...

Rep. Julia Letlow will compete in a Republican Senate primary runoff in Louisiana, NBC News projects.

Louisiana Republican Sen. Bill Cassidy wanted his reelection campaign to be about the “present and the future.” President ...

Sen. Bill Cassidy may remember coming in third place, but the American people will be left with his legacy of playing a role ...

Fox News senior correspondent Jonathan Serrie reports on the primary defeat of Sen. Bill Cassidy, R-La., whose loss signals ...

Sen. Lindsey Graham said Sen. Bill Cassidy’s primary loss shows Republicans who oppose President Donald Trump or his agenda ...

U.S. Rep. Julia Letlow and state Treasurer John Fleming have advanced to a runoff in Louisiana’s Republican Senate primary, ...

Letlow won 45% of the Senate primary vote against Cassidy, state Treasurer John C. Fleming and other GOP challenger Mark ...

La., reacts to his colleague Bill Cassidy's primary defeat in Louisiana and former Vice President Kamala Harris' potential ...