Republican lawmakers were anxious on Wednesday after President Donald Trump made it clear that he plans to wade into the Texas primary runoff. After Trump pressured Texas to redistrict to try to maintain its Republican majority in Congress, the Lone Star state could see a red Senate seat flip to blue in the midterms — a growing concern among the GOP. Then, by Wednesday, Trump threatened to force one of the candidates to drop out before the runoff in May between incumbent Sen. John Cornyn and Te...