Following former South Bend Mayor Pete Buttigieg’s narrow win over Sen. Bernie Sanders (I-Vt.) in last week’s Iowa Democratic caucuses, the two presidential candidates are duking it out in New Hampshire: Sanders slammed Buttigieg for accepting campaign contributions from billionaires, and Buttigieg said Sanders’ policies skew too far to the left. Mother Jones’ digital producer Mark Helenowski caught up with Buttigieg and Sanders supporters on the trail this week to find out what pushed them to support one candidate over the other—and whether they’d vote for their candidate’s opponent.