If ever a single day of fundraising could make or break a candidate’s campaign, it’s this guy this year against this field.Team Beto knew it too. On Thursday morning, when he formally announced his candidacy, his campaign sent an email to supporters declaring, “What we raise in the first 24 hours will set the tone in the national conversation about the viability of our campaign.†That’s correct. If anything could instantly erase doubts about O’Rourke’s viability, a bombshell first-day number could. “The Senate campaign wasn’t a fluke,†people would say. “Those donors didn’t shower him with cash because they...