Democrats haven't won a statewide race in GOP-dominated Texas since the 1990s. But a U.S. Senate race in the Lone Star State, according to polls, is highly competitive. Centrist Democrat James Talarico, polls say, has a good shot against the controversial Republican nominee, far-right Texas Attorney General Ken Paxton. And according to Politico, angst among rural voters could give Democrats long-awaited statewide victories in a state Republicans…