Democratic Rep. Jasmine Crockett launched a campaign Monday for the U.S. Senate in Texas, bringing a national profile to a race that may be critical to Democrats' long-shot hopes of reclaiming a Senate majority in next year's midterm elections. Crockett, one of Congress' most outspoken Democrats and a frequent target of GOP attacks, jumped into the race on the final day of qualifying in Texas. She is seeking the Senate seat held by Republican John Cornyn, who is running for reelection in the GOP-dominated state...