Louisiana Senator Bill Cassidy faces a competitive Republican primary challenge from Representative Julia Letlow, who has Trump's endorsement, as recent polling shows him trailing both Letlow and state Treasurer John Fleming.

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Louisiana Sen. Bill Cassidy (R) is fighting for his political life in a GOP Senate primary Tuesday. Trump has endorsed Rep. Julia Letlow (R) in her challenge against Cassidy. Polling from last month shows the incumbent trailing Letlow and Republican John Fleming, who currently serves as the state treasurer. On the other side of the aisle, three…