US President Donald Trump endorsed Texas Attorney General Ken Paxton in the state’s Republican Senate primary shortly after early voting began in an increasingly personal and expensive run-off against incumbent Senator John Cornyn. “Ken Paxton has my Complete and Total Endorsement to be the next United States Senator from the Great State of Texas – KEN PAXTON WILL NEVER LET YOU DOWN!,” Trump said in a social media post on Tuesday. The timing of the move came as a shock, with early voting already...