Senate Majority Leader John Thune urged President Donald Trump on Wednesday to deliver a swift endorsement of Texas Sen. John Cornyn to potentially forestall what is widely expected to be an expensive and nasty primary runoff against Texas Attorney General Ken Paxton. Thune told reporters he hasn’t yet spoken to Trump since the election returns from Tuesday’s primary came in but indicated he intends to personally redouble his efforts, saying Wednesday that “hopefully” the president will give Cornyn his influential nod. “[If] Trump endorses early, it saves everybody a lot of money, and … 10 weeks of a spirited campaign...