Senator Bernie Sanders and Representative Alexandria Ocasio-Cortez drew thousands to a Folsom rally. The visit was part of their national “Fighting Oligarchy” tour.

Democrats have sometimes seemed confused about how to confront the second Trump administration, but Sen. Bernie Sanders (I-Vt.) and Rep. Alexandria Ocasio-Cortez (D-N.Y.) are responding with boldness: They are roving across red states — and drawing big crowds — with a series of anti-Trump rallies.