NEW: President Trump is expected to endorse John Cornyn over Ken Paxton in the Texas GOP primary runoff, three people briefed on the deliberations tell me + @michaelscherer: https://www.theatlantic.com/politics/2026/03/trump-cornyn-endorsement-texas/686232/?gift=4hw0kpXoznWlLknE4UqVG3-OEbZ6sY1Li8diVAFH0kA&utm_source=copy-link&utm_medium=social&utm_campaign=share