Inside the Organizing Effort That’s Powering Pete Buttigieg’s Iowa Surge

November was a good month to be Pete Buttigieg. After a slow summer, the South Bend mayor stormed into the lead in the first-in-the-nation caucus state of Iowa. His campaign spent $2.8 million on ads in the state this fall, many featuring footage from his lauded address at last month’s Liberty and Justice Celebration—the same party dinner (since renamed) that jumpstarted Barack Obama’s campaign 12 years ago. When the Des Moines Register released its latest Iowa poll a few weeks later, Buttigieg was in first at 25 percent, 10 points...