After attacking the Texas attorney general, who won the G.O.P. nomination, Senate Republicans are pivoting sharply to support him in what is now a competitive race.

© Desiree Rios for The New York Times

Senators are angry President Trump turned on a respected former leader whom they consider a loyal Republican. Now Mr. Trump faces resistance from his own embittered ranks.

© Ilana Panich-Linsman for The New York Times