By Joseph Ax (Reuters) -Texas held the United States’ first primary nominating contests of 2022 on Tuesday, eight months before the midterm elections that will determine control of the U.S. Congress as well as the governors of 36 states. Under Texas law, if no candidate earns a majority of the vote in any given election, the two top finishers head to a runoff on May 24. Here are some key races to watch: ABBOTT, O’ROURKE FACE NOVEMBER MATCHUP Republican Governor Greg Abbott handily fended off two more-conservative challengers, former Texas Republican Party Chairman Allen West and former state S…