Alabama voters are choosing between U.S. Representative Barry Moore and former Navy SEAL Jared Hudson in a Republican primary runoff to fill the Senate seat left open by Tommy Tuberville, who is running for governor. Moore, a three-term member of the conservative House Freedom Caucus with Donald Trump's endorsement, led the first round of voting in May with nearly 40% against Hudson's 25%, though Hudson has sought to cast Moore as a Washington insider despite both men claiming loyalty to Trump's agenda. The outcome will help gauge the continued strength of Trump's endorsement in Republican primaries, with the winner advancing to November's general election in a state where Republicans currently hold every statewide office.