WATCH: Embattled GOP senator warns red state ‘at risk’ of historic Dem victory as voters head to polls

As voters head to the polls today in Texas, GOP Sen. John Cornyn is warning the longtime red state is "at risk" of Democrats pulling off a historic upset for a critical Senate seat.

Cornyn’s primary race against challenger Texas Attorney General Ken Paxton finally comes to a head in today’s runoff election. After what has been a particularly bruising primary, Cornyn expressed his worry that Republicans stand to lose a seat that would be devastating for the party’s hopes of retaining a majority in the upper chamber.