Texas Attorney General Ken Paxton and U.S. Senator John Cornyn are headed to a runoff in the Texas Republican U.S. Senate primary, the Associated Press projected, after neither candidate secured a majority of the vote Tuesday. As both fell short of the 50 percent threshold, they will lock horns in a May runoff to decide the Republican nominee. The race between Paxton and Cornyn had developed into a test of the Republican Party’s direction in the Lone Star State, long dominated by the GOP. The