ALLEN, Texas (AP) — President Donald Trump on Tuesday endorsed Texas Attorney General Ken Paxton in the GOP primary for U.S. Senate, supercharging his effort to oust incumbent Sen. John Cornyn in next week’s runoff.“Ken is a true MAGA Warrior who has ALWAYS delivered for Texas, and will continue to do so in the United States Senate,” Trump wrote on social media.News of the endorsement broke during a Paxton campaign event, drawing cheers from supporters who began dancing to “YMCA,” a Trump campaign anthem. “I have so much respect for the president and appreciate so much his endorsement,” Paxton said at the event in Allen, Texas. Paxton and Cornyn advanced to a May 26 runoff after finishing as the top vote getters in a March 3 primary where no candidate won a majority. Rep. Wesley Hunt finished third and did not advance.Although the four-term Cornyn has backed Trump’s agenda in Washington, Paxton pitched himself as a political warrior for the Make America Great Again movement. Trump’s endorsement puts him at odds with his party’s establishment, which is convinced that Cornyn is the better candidate for November’s general election. The Democrats nominated Texas State Rep. James Talarico as their candidate for Senate.