Andrew Yang, a former tech executive, remains one of the least known candidates in a Democratic presidential field that includes senators, mayors, a governor and a former vice president. But by focusing on the potential impact of automation on jobs, he has attracted surprisingly loyal and passionate support. One of our technology writers has been following his campaign since before it officially began. Guests: Andrew Yang, a candidate for the Democratic presidential nomination; and Kevin Roose, who writes about technology for The New York Times. For more information on today’s episode, visit nytimes.com/thedaily.  Background reading: Armed with numbers, history lessons and the occasional self-deprecating joke, Mr. Yang has been preaching a grim gospel about automation. And voters are responding.The top 10 Democrats will share one stage for the first time starting at 8 p.m. Eastern. Here’s what to watch for.