Here are five things to know about Cornyn as the U.S. Senate race unfolds.

Hours after Texas Attorney General Ken Paxton announced he would challenge U.S. Sen. John Cornyn in the GOP primary next year ...

Dr. Jessica Shepherd, chief medical officer for Hers, joins ABC News Live to discuss the results of the president’s physical.

Texas Attorney General Ken Paxton, a close ally of President Donald Trump, announced Tuesday he will challenge Sen. John ...

John Cornyn, R-Texas, walks to the House Chamber before of President Donald Trump addresses a joint session ... has now ...

Sen. John Cornyn (R-TX) spoke about his reelection campaign and efforts to secure an endorsement from President Donald Trump.

President Donald Trump weighed in on an already contentious Senate primary race in the most populous red state in the nation, saying he will make an endorsement decision “at the right time." ...

U.S. Sen. John Cornyn on Tuesday defended President Donald Trump's new global tariffs, saying "unfair trading practices have ...

John Cornyn has been a reliable Texas conservative across more ... in court over the Biden administration and other bogeymen. At the very time that Donald Trump’s administration argues, correctly, ...

The markets might be in free fall, but Capitol Hill Republicans are managing to move forward with President Donald Trump’s ...