New Hampshire’s 1st District is wide open for the first time in years. Democrat Chris Pappas held it since 2018, but he’s running for the Senate now. That left a rare vacancy in one of New England’s few true swing seats. Kamala Harris carried the district by about two points in 2024. So both parties see a real contest here. The district runs from Manchester through the Seacoast and up into the Lakes Region. It has flipped between the parties repeatedly over the last two decades, which is exactly why it draws such crowded fields.

The Democratic field is large. Nine candidates filed for the 8 September primary. Among them are Maura Sullivan, a Marine veteran and former Obama administration official; Stefany Shaheen, a former Portsmouth city councilor and the daughter of Senator Jeanne Shaheen; and Heath Howard, a young state representative running as a populist. There’s even a second veteran in the mix, Army National Guard officer Christian Urrutia.

That crowd is the whole story. In a nine-way race, no one needs a majority to win. A candidate can take the nomination with a plurality, sometimes a small one. That math rewards a distinct brand and a loyal base. It also means a strong profile, like military service, can get lost in the noise if it doesn’t break through. With the vote split so many ways, a few thousand ballots could separate first place from third. That makes every advantage, and every stumble, matter more than usual.

Sullivan’s resume fits the model this site has tracked all cycle. She served as a Marine Corps captain and deployed to Iraq. After the military, she worked at the Department of Veterans Affairs and the Pentagon under President Obama. She holds a degree from Harvard, and she now serves as vice chair of the state Democratic Party. On paper, she’s a textbook veteran-outsider candidate. Few contenders in the field can match that combination of service and governing experience.

She also owns the money race. Sullivan has raised about $2.6 million, leading the field for four straight quarters, with roughly $1.5 million left to spend. National groups have lined up behind her, including VoteVets, and veteran members of Congress have campaigned for her. By the traditional measures of a strong campaign, she’s out front.

Yet the polling tells a different story. The most recent public survey put her in third place. Two rivals sat ahead of her. For a candidate with the best resume and the most cash, that’s a gap worth taking seriously. It’s also the honest heart of this race.

The two names ahead of her explain a lot. Stefany Shaheen carries one of the most recognized surnames in New Hampshire politics. Her mother has represented the state for decades, first as governor and then in the Senate. In a low-turnout primary, that kind of name identification is worth a great deal on its own. Voters recognize it instantly, and recognition often becomes support in a crowded field.

Heath Howard comes at it from another angle. He’s a young state representative pitching himself as the populist in the race. That lane has its own energy, especially among the progressive activists who turn out in primaries. New Hampshire has rewarded insurgent grassroots candidates before. Carol Shea-Porter rode antiwar energy to this very seat in 2006.

So Sullivan is boxed in from two directions. On one side, a dynasty name with built-in familiarity. On the other, a populist with activist enthusiasm. Her service record is a genuine asset, but it doesn’t automatically beat either of those forces. That’s the puzzle her campaign has to solve before September. She has to give primary voters a reason to pick her over a name they already know and a message built to excite the base. Neither task is simple in a field this size.

Here’s the case for optimism about Sullivan. Early polls in crowded primaries are soft. Many voters aren’t paying attention yet. Name recognition dominates before the ads start, which flatters a candidate like Shaheen. Once Sullivan puts her $1.5 million to work on television, the picture could shift fast.

Money buys the tools to close a gap like this. It funds the ads that introduce her service story to voters who don’t know it yet. It pays for the field program that finds supporters and gets them to the polls. In a plurality race, a well-run turnout operation can be decisive. Sullivan has the resources to build one, and the runway to use it.

Still, cash isn’t a guarantee. She led the money race in 2018 too, and she came up short. Voters don’t cast ballots based on fundraising totals. They respond to a message and a messenger. The question is whether Sullivan’s pitch, backed by all that money, can move numbers that haven’t moved yet. That’s the work of the summer, and the clock is running toward September.

This is where the honest analysis lands. We’ve argued that veterans tend to outperform, because a service record builds trust with swing voters. That case is strongest in a general election, against a single opponent, where credibility on security and country cuts across party lines. It’s a different challenge inside a crowded Democratic primary.

In a primary, Sullivan isn’t contrasting with a Republican. She’s competing with other Democrats who bring their own strengths. A famous name and a populist message don’t care much about a military resume. So the veteran advantage, so powerful in November, does less work in September. That’s not a knock on the model. It’s a limit worth naming plainly.

There’s a flip side, though. If Sullivan wins this primary, her profile becomes a weapon again. In a Harris-won swing district, a Marine veteran running on competence would be a tough out for any Republican. The veteran brand may not be what wins her the nomination. It could still be what wins the seat, if she gets there. That distinction is the key to reading this race. The trait that struggles to separate her from other Democrats is the same trait that would separate her from a Republican in the fall.

Sullivan has been here before, and that history matters. She ran for this same seat in 2018. Her campaign broke state fundraising records and won national backing from groups like VoteVets and EMILY’s List. In the end, she finished second in an eleven-way primary, losing to Pappas. He had deeper local roots and decades in New Hampshire politics.

The parallels are hard to miss. Once again she leads in money. Once again she faces a crowded field and a candidate with a local advantage. The lesson from 2018 is that resources and endorsements don’t settle these races by themselves. What was missing then was the last mile, the connection that turns a strong profile into the most votes. Whether she has closed that gap is the real test of her campaign.

A few signals will tell us where this is heading. Watch the next round of public polling, and whether Sullivan’s ad spending narrows the gap. Watch the endorsements, especially any that carry weight with Seacoast and Manchester voters. And watch turnout signals, since a small, motivated base can decide a plurality primary. The general election matters here too. This is a seat Democrats want to hold as they try to retake the House, and the party’s nominee will start the fall in a genuine tossup.

The bigger point stands whatever happens. NH-01 is a live test of how much a veteran profile is worth when the opponent isn’t a Republican. Sullivan has the resume, the money, and the backing. She’s still chasing two rivals. If she catches them, it validates the model in a hard case. If she doesn’t, it’s a useful reminder that even the best profile has to win the room it’s in. Either way, this race is worth watching closely. And it’s a reminder that the veteran playbook, powerful as it is, still has to be run well to work.