The scenario long-dreaded by Republican strategists looks increasingly plausible following Tuesday’s primary election in Texas: Democrat James Talarico may face Republican Ken Paxton for the state’s U.S. Senate seat in November. Paxton is heading for a runoff against Sen. John Cornyn where he is likely to be at least a slight favorite, though the final results from the first round of voting could shift expectations. Talarico defeated Rep. Jasmine Crockett in the Democratic primary, according to Associated Press projections. Republicans fear the matchup could, at the very least, cost the party tens of millions of dollars to protect Paxton, the...