Back. President Trump's influence over the Republican party is about to face another set of key tests. Louisiana Senator Bill Cassidy and Kentucky Congressman Thomas Massie both face Trump backed primary challengers in the coming days.They're the latest targets in the president's effort this cycle to oust incumbent members of his own party that he's deemed insufficiently supportive of his agenda. Most recently in Indiana, five out of seven Republicans who had opposed the president's redistricting push were ...