Beto O’Rourke’s response to a question during a Houston town hall meeting this past summer lasted only four minutes. But for some Democrats it said everything. It was authentic. In an exchange that quickly went viral, the Democrat congressman and Senate hopeful was asked whether he found NFL players who knelt during the national anthem to be disrespectful. A passionate O’Rourke told the room of Texans, not necessarily a sympathetic crowd, that he could “think of nothing more American than to peacefully stand up, or take a knee, for your rights.” Clips of his answer were viewed millions of times...