Sununu lowers expectations for Haley in Tuesday's New Hampshire GOP primary

In December, the Republican governor had predicted she'd win in a "landslide."

"That's the only expectation we ever laid out there. Now to the fact that she's challenging him to actually win the state, something no one in the media ever thought was possible, that gets everybody really excited," he said on Wednesday. "I mean, that's a pretty big hill to climb, to be sure, but it can be done."

But speaking with ABC "This Week" co-anchor Jonathan Karl in December, just after endorsing Haley, Sununu said that the Granite State was "an absolute win" for the former U.N. ambassador.

"It's a win and a reset button," he added, predicting she would secure the vote in a "landslide" victory, prompting Karl to interject.

"He's setting a bar for you there, an expectation," Karl said to Haley.

"He knows his state better than I do," Haley responded, pointing to Sununu.

Pressed on Thursday by ABC News' Rachel Scott about which one it was — would Haley win in a landslide or would she be a "strong second" in the state — Sununu said it was "all about getting the vote out."

"So, if everyone that can possibly vote comes out, that would be tremendous, and I have no doubt that we could get a victory here, but the expectation was we want a strong second place, we've got that. We've already exceeded those expectations," he told Scott after Haley's Thursday town hall in Hollis, New Hampshire.

"My plan is that we wanted to be strong in Iowa, we did that. We want to be stronger in New Hampshire, we're going to do that. We want to go to my sweet state of South Carolina, we want to be even stronger there. It's about just continuing to move up," Haley added.

But Haley, whose campaign and allies have spent over $26 million in New Hampshire on advertising and exercised an aggressive ground game, still trails her top rival, Trump, by more than 10 points in the state, according to 538, as DeSantis' standing has collapsed to just 5% of those polled supporting him.

Undeclared voters, who can vote in either Republican or Democratic primaries in the state, make up nearly 40% of all registered voters in New Hampshire, making it a potentially significant demographic for Haley as she works to catch up with Trump.

Haley has embarked on a host of retail stops this week which ramped up on Friday, hoping to capitalize on intimate conversations with voters and will be joined by Sununu, a popular anti-Trump Republican who overperformed with undeclared voters to win his fourth gubernatorial election in 2022.

Americans For Prosperity Action, a Super PAC established by the Koch Brothers network that endorsed Haley in December, launched a $27 million mail and digital campaign targeting early states flooding the airwaves and deploying hundreds of door knockers.

Meanwhile, Trump has ramped up attacks on Haley this week, zeroing in on her electability in the general election and her possible down-ballot impact, even accusing her of "counting on Democrats and liberals to infiltrate" the Republican primary in New Hampshire as Haley attempts to make a play for undeclared voters in the state.

"A vote for Nikki Haley this Tuesday is a vote for Joe Biden and a Democrat Congress because that's what's going to happen," Trump said in Portsmouth, New Hampshire, on Wednesday -- his second campaign stop in New Hampshire since the Iowa caucuses.

"I don't know that she's a Democrat, but she's very close," Trump said in Portsmouth. Earlier that day, he had posted on social media a picture of Hillary Clinton with Haley's face edited in.

"That's just one of the many positions that they take, makes them, in my opinion, completely unelectable," Trump said of both Haley and DeSantis in Portsmouth.

"You know, you've got a choice to make in five days. And the country is all watching. In five days, we will shock the country," Haley told the crowd in Hollis on Thursday. "Let's get it done."