In many ways Austin, Texas, was the last place Beto O’Rourke should have been with just over a month left until a pivotal U.S. Senate election. The deep-blue city, smack dab in the middle of a deep-red state, likely doesn’t have many of the undecided voters the Democrat, whose aggressive challenge to GOP Sen. Ted Cruz has become somewhat of a national fascination, needs to win this November. So in front of a crowd estimated at 55,000 people, a truly impressive number for a U.S. Senate race, with the Austin skyline behind him, O’Rourke fired up the crowd with an...