WASHINGTON _ Texas still runs red.
But in the first test of the state's changing demographics this election year, turnout in the Democratic presidential primary surged on Super Tuesday, fueling Republican fears that their greatest electoral stronghold is no longer absolutely safe.
More than 1.85 million voters participated in the competitive primary contest Joe Biden won this week. That represented a greater than 30% increase from the Democratic contest four years earlier, when roughly 1.4 million people voted in a contest won by Hillary Clinton.
