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

Sen. Bill Cassidy was decisively defeated in Louisiana’s Republican primary Saturday, failing to overcome backlash from GOP ...

Louisiana Senator Bill Cassidy failed to qualify for the upcoming June 27 Republican runoff for his Senate seat, finishing ...

President Donald Trump and Health Secretary Robert F. Kennedy Jr. succeeded in their efforts to defeat Senator Bill Cassidy in Louisiana’s Republican primary, a signal of the en ...

NEW ORLEANS (AP) — When Charles Wandfluh voted in Louisiana's Republican primary over the weekend, he could only conjure the unflattering image of a panicked rodent when talking about Bill Cassidy's ...

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

Sen. Bill Cassidy of Louisiana failed to make the runoff in his GOP Senate primary five years after his vote to convict ...

Sen. John Kennedy says Trump's endorsement had a "huge impact" in Louisiana's Senate race, where Rep. Julia Letlow topped ...

It was a hurdle too high for Bill Cassidy to clear. The Republican senator from Louisiana had tried to satisfy Donald Trump ...

NBC's Kristen Welker hosts Ryan Nobes, Adrienne Elrod, and Lanhee Chen to discuss Sen. Bill Cassidy losing to a Trump-backed primary challenger, Julia Letlow.