New Hampshire is a make-or-break moment for Nikki Haley, the former South Carolina governor challenging Trump for the Republican nomination. Plus – on the Democrats’ side – why Biden isn’t on the ballot, and who is. Read more:Nikki Haley has emerged as the only major candidate remaining in the Republican primary against former president Donald Trump. A strong showing in New Hampshire on Tuesday could give her the momentum she needs to forge ahead with her campaign. Campaign reporter Dylan Wells has been following Haley, and she explains why Haley’s message is resonating with many voters in New Hampshire.  Then, we turn to the unusual situation playing out for the Democrats. Biden and the Democratic National Committee decided that South Carolina should be the first primary – but New Hampshire decided to continue to hold its long-prized first-in-the-nation primary earlier, in defiance of the new party rules. So Biden opted not to put his name on the ballot. The contest carries no practical weight since the DNC has stripped the state of its delegates to the nominating convention – but that hasn’t stopped Marianne Williamson and Rep. Dean Phillips from running. Today’s show was produced by Rennie Svirnovskiy, Emma Talkoff, Arjun Singh and Elana Gordon. It was mixed by Sean Carter. It was edited by Maggie Penman. Subscribe to The Washington Post here.