US Senator Cassidy’s vote to convict Trump looms over Louisiana primary

A Republican senator from Louisiana is facing a primary challenge after voting to convict US President Donald Trump in impeachment proceedings. The senator, who joined seven Republicans in voting to convict Trump, is seen as a barometer of Trump's hold over the Republican Party. Trump has endorsed a rival candidate in the Senate race, increasing the senator's chances of losing the primary. The winner of the Republican primary is likely to win the general election in the deep-red state.