Hillary Clinton and Sen. Bernie Sanders promoted a plan for debt-free college at a campaign event in Durham, New Hampshire on Wednesday, marking the second joint appearance on the campaign trail for the two former Democratic primary opponents. The democratic socialist from Vermont, who famously gave Clinton a scare early in the Democratic primary by defeating her badly in New Hampshire, returned with her to the Granite State to help his former in the election against Donald Trump. Sanders and Clinton discussed the merits of their college plan, which would make public colleges and universities tuition free for any student from a family making under $125,000 a year.