Trump's endorsement power faces new test in Louisiana Republican Senate showdown

President Trump's endorsement power in Republican primaries faces scrutiny as Louisiana voters choose between Rep. Julia Letlow and state Treasurer John Fleming for a Senate seat. Letlow, backed by Trump, won the primary with 45% of the vote, while Fleming secured 28%, leading to a runoff after no candidate reached 50%. A Letlow victory would bolster Trump's influence, while a Fleming win would mark a third endorsement setback for Trump in recent GOP primaries.