In Trump’s Second Midterm, Democrats Are Looking for Fighters

Attitudes in the party have shifted, Democrats say, with a growing appetite for outsider candidates vowing to overhaul the system. Some worry that the trend could be costly in November.Darializa Avila Chevalier, left, and Claire Valdez, holding the U.A.W. sign, are on track to double the number of Democratic Socialists of America members in the House. They flank Brad Lander, a Democrat, who also won his primary.