John Cornyn faces his own party's attorney general Ken Paxton in Tuesday's marquee Texas runoff after President Trump endorsed the challenger. Cornyn argues Paxton's scandals make him too risky against Democrat James Talarico, who raised $27 million in Q1, nearly four times Paxton's total. Republicans fear the endorsement hands the seat to Democrats in a state that hasn't lost statewide in 30 years.

The Houston 18th District pits 78-year-old incumbent Al Green against 38-year-old Christian Menefee, with crypto industry money flooding Menefee's campaign. In Dallas, Colin Allred, who vacated his seat to run for Senate and lost to Ted Cruz, now faces his own successor Julie Johnson after switching back to House. Business implications ripple through both races given the parties involved.

In the 35th District, Republican-tied super PAC spending $900,000 boosts Maureen Galindo, accused of antisemitic remarks, against sheriff's deputy Johnny Garcia. The Texas AG runoff between Mayes Middleton and Chip Roy will shape the state's regulatory direction regardless of the Senate result.