Texas Senate Republican Primary Runoff: What to know about Cornyn-Paxton face-off

Voters will choose their nominee for ​U.S. Senate on Tuesday in a race that could help decide control of the chamber and may become one of the ​most expensive in history. John Cornyn, a 74-year-old four-term senator backed by Republican leadership, is locked in the fight of his political life against Ken Paxton, a 63-year-old, scandal-plagued attorney general who won President Donald Trump's endorsement last week. Paxton has led Cornyn in most public opinion polls, putting him on a collision course to face the Democratic nominee, 37-year-old state Representative James Talarico, a Presbyterian seminarian and leading ‌fundraiser whose campaign has appealed ⁠to independent and ⁠moderate voters.