Cornyn and Paxton go head-to-head in Texas Republican Senate primary after Trump endorsement

Donald Trump's endorsement of Texas Attorney General Ken Paxton has upended the Republican Senate primary runoff against incumbent Senator John Cornyn, with polls now open for voters to decide the race. Cornyn narrowly led Paxton in the March primary but failed to avoid a runoff, and his campaign has attacked Paxton over ethical and legal scandals including impeachment by the Texas House and indictment for securities fraud, while Paxton portrays Cornyn as an establishment Washington figure. The winner will face Democrat James Talarico in November's general election, making this expected to be one of the nation's most expensive Senate races as Republicans seek to maintain Senate control.