Tuesday showed that the enduring deep-blue coalition of the future Democrats are always talking about still lies in the future. The Democrats had a huge opportunity to unseat Ted Cruz last night. They blew it by thinking a gentry Hollywood-style liberal was the right candidate for Texas. The not-overly-beloved Senator Cruz defeated Representative Beto O’Rourke by 2.6 percentage points in a race an incumbent Republican should have expected to win easily, on the same night Republican governor Greg Abbott won reelection by 13 points. Yet the Democratic reaction to O’Rourke’s loss is not, as far as I can tell, “Maybe...