President Trump’s decision not to weigh in before the deadline means both John Cornyn and Ken Paxton remain on the ballot, extending their costly and increasingly personal battle into a May runoff. President Trump let a key filing deadline pass on Tuesday without endorsing a candidate in Texas’ Senate race, locking in a high-stakes Republican runoff between the incumbent, John Cornyn, and the state’s attorney general, Ken Paxton. Mr. Trump coul... [887 chars]