From 2h agoVoters in six states head to polls with all eyes on Kentucky primary raceHello and welcome to the US politics live blog.Voters will head to the polls in primaries across six states today, with the contest in Kentucky seen as a test of Donald Trump’s grip on the Republican party.Trump launched a tirade against the state’s congressman Thomas Massie over the weekend as he looks to remove him from office.Massie is one of very few senior Republicans who has dared to defy Trump, with the president calling him the “worst and most unreliable Republican Congressman in the history of our Country”. He went on to call on Kentucky voters to “vote the bum out on Tuesday” on social media.Massie has been a consistent thorn in Trump’s side, voting against his signature tax and spending cuts bill, helping to force the justice department to release the Jeffrey Epstein files, and insisting on congressional oversight over the military actions in Venezuela and Iran. Now he faces a bruising primary against his Trump-endorsed challenger, Ed Gallrein.Republican voters in Kentucky will also choose their candidate to replace Mitch McConnell, the former Senate GOP leader who is retiring. The frontrunners to succeed McConnell are congressman Andy Barr and former state attorney general and gubernatorial candidate Daniel Cameron.Among Democrats, Charles Booker and Amy McGrath, who lost Senate races in the state in 2022 and 2020, respectively, are vying for their party’s nomination once again.Meanwhile, voters in Pennsylvania, Georgia, Alabama, Oregon and Idaho will also head to the polls to select candidates ahead of November’s midterm elections.In other developments: