Texas Attorney General Ken Paxton could be headed for a primary runoff, with nearly half the votes counted late Tuesday, according to Decision Desk HQ. In a field of four candidates, not enough Texas Republican primary voters appear convinced that the two-term incumbent should remain the Republican’s candidate for the job. That could put the embattled attorney general on the defensive in the biggest fight of his political life. Candidates Eva Guzman, a former Texas Supreme Court Justice, and Land Commissioner George P. Bush are neck and neck in their own fight to determine who will come out in second...