Texas voters head to the polls today for key runoff elections, with the most closely watched contest pitting incumbent Sen. John Cornyn (R) against challenger Ken Paxton, the state's attorney general. Cornyn is attempting to defy a trend that has seen many Republicans lose primaries after drawing President Trump's ire.

Trump has thrown his full weight behind Paxton, endorsing him and attacking Cornyn as disloyal. The president's involvement has energized Paxton's campaign and raised questions about Cornyn's political survival. For more on the dynamics, see Trump's endorsement of Paxton and Cornyn's fight.

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The U.S. launched defensive strikes in southern Iran on Monday, even as negotiations proceed. In Texas, the Cornyn-Paxton runoff election tests Trump's political influence.

The race has become a proxy battle for the direction of the Texas GOP, with Paxton representing the Trump-aligned, populist wing and Cornyn embodying the more traditional, establishment conservatism. Political analysts note that a Paxton victory would signal a significant shift in the state's Republican landscape.

Cornyn has refused to back Paxton ahead of the runoff, a move that has further strained relations between the two camps. This standoff highlights the deep divisions within the party. The latest predictions from betting markets suggest Paxton may rout Cornyn, as detailed in Kalshi's forecast of a Paxton win.

Meanwhile, the broader political calendar is pressing. The clock is ticking for the GOP to unify ahead of the general election, and internal battles like this one could weaken the party's chances. Trump is also defending his administration's Iran deal, a stance that has drawn criticism from some Republicans but aligns with his foreign policy approach.

In other news, Pope Leo has weighed in on artificial intelligence, urging ethical guidelines as the technology advances. The Vatican's statement comes amid growing global debate over AI regulation, with Trump recently pulling an AI testing order over innovation concerns, as reported in Trump's decision to halt AI testing.

The Texas runoff results will be closely watched as a bellwether for the GOP's internal dynamics and the enduring power of Trump's endorsement. For Cornyn, today's vote may determine whether he can pull off a Texas miracle or become the latest casualty of the party's populist wave.