Texas Runoff Pits Cornyn Against Trump-Backed Paxton

Texas voters decide Tuesday between longtime Sen. John Cornyn and state Attorney General Ken Paxton in a Republican primary runoff that tests the reach of President Donald Trump's endorsements. The contest follows a March primary in which Cornyn captured 42 percent and Paxton 40.5 percent, leaving neither with a majority. The winner will face Democratic state Rep. James Talarico in November for a seat that could help determine control of the Senate.

Trump endorsed Paxton last week, calling Cornyn "VERY disloyal" and shifting the race decisively toward the challenger. Paxton, a consistent Trump supporter during earlier controversies, has positioned himself as an outsider willing to confront federal agencies and corporate interests on issues from border security to health policy. Cornyn, first elected in 2002 and a former Senate Republican whip, has defended his record of legislative deal making while facing attacks that tie him to bipartisan measures on guns and spending.

The contest has drawn record spending, making it the costliest Senate primary in history. National Republican groups have funneled resources to Cornyn, arguing his fundraising and general election strength would protect the party's narrow majority more reliably than Paxton, who carries legal and ethical baggage from past investigations. Paxton's backers counter that Cornyn represents an insulated Washington class more attuned to institutional norms than to voter priorities on immigration enforcement and regulatory restraint.

Public polling has shown Paxton ahead since the endorsement, reflecting broader patterns in recent cycles where Trump's support has consolidated support among primary voters skeptical of establishment continuity. Turnout will matter in suburban areas around Houston and Dallas, where early events drew crowds focused on Paxton's record of lawsuits against federal health and environmental rules. Supporters at one rally described him as someone with the resolve to challenge entrenched bureaucracies rather than accommodate them.

The outcome carries downstream effects. A Paxton victory would place a more confrontational figure in the general election against Talarico, a state legislator who defeated a progressive rival in the Democratic primary and has drawn attention from national party figures. Democrats have not won a Texas Senate seat since 1994, yet the state's shifting demographics and the cost of defending the seat have prompted warnings from Senate Republicans about resource drains elsewhere.

Cornyn has warned that nominating Paxton could force the party to divert hundreds of millions from other races. Paxton's campaign has emphasized independence from such calculations, stressing instead direct accountability to voters who backed Trump's agenda on trade, regulation and institutional reform. The runoff thus distills recurring tensions between incumbents with long records of incremental compromise and challengers who prioritize disruption of existing arrangements.

Results are expected after polls close at 9 p.m. Eastern time, with absentee and early votes already shaping expectations in key counties.