Hunting in the wilderness: How Bill de Blasio, Kirsten Gillibrand and others are straining to connect with Democratic primary voters

The mayor of New York City, Bill de Blasio, and the junior senator from New York, Kirsten Gillibrand, are both running for president. But a third candidate from New York seemed to get a far more rapturous reception in South Carolina this weekend: Andrew Yang, the tech entrepreneur whose campaign...