Democrats are seizing on Sen. Kelly Ayotte Kelly Ann AyotteBottom line Bottom line Bottom Line MORE’s (R-N.H.) remarks at a debate that Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE is “absolutely” a role model for children as a pivotal moment in the race for the Senate majority.

The Democrats see Ayotte’s comments, which she immediately sought to walk back, as a potential turning point not only in the tight New Hampshire race but also in the broader fight across a host of battleground states.

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The Democratic Senatorial Campaign Committee released a digital ad Tuesday that simply contains unedited footage of the moment, while liberal star Sen. Elizabeth Warren Elizabeth WarrenJudd Gregg: The Kamala threat — the Californiaization of America GOP set to release controversial Biden report Biden's fiscal program: What is the likely market impact? MORE (D-Mass.) issued a stream of tweets ripping Ayotte.

“Think about it: @realDonaldTrump calls Latinos rapists, African Americans thugs, & women fat pigs, & Kelly Ayotte thinks he’s a role model,” Warren wrote in one of the tweets.

“You can’t walk this back. ... [You] can’t support @realDonaldTrump’s agenda, say you’re voting for him, then pretend to shake your finger,” she added in another message.

Ayotte, who says she supports Trump but will not endorse him, tried to clarify her remarks after the debate, releasing a statement that said neither Trump nor Democratic nominee Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE “have set a good example and I wouldn’t hold up either of them as role models for my kids.”

Democrats signaled Tuesday that they believe the Ayotte story has legs and that Trump’s comments about women can be used against other Republican Senate candidates.

In New Hampshire, Ayotte’s Democratic opponent, Gov. Maggie Hassan, scheduled a press call on Tuesday to talk up the issue and released a web ad tying Ayotte’s remarks to Trump’s own comments.

The Ayotte flap is contributing to a notable shift in momentum in the race for the Senate.

For much of the year, Republicans have been fighting an uphill battle. The electoral map favors Democrats, and Republicans have been worried that Trump would hurt their Senate candidates.

But the GOP had been feeling better in recent weeks.

Polls had tightened in the presidential race between Trump and Clinton, and Sen. Rob Portman Robert (Rob) Jones PortmanMcConnell locks down key GOP votes in Supreme Court fight Romney undecided on authorizing subpoenas for GOP Obama-era probes Congress needs to prioritize government digital service delivery MORE (R) had roared ahead of his competition in Ohio, seemingly taking one possible pickup opportunity off the table for Democrats. Sen. Marco Rubio Marco Antonio RubioMurky TikTok deal raises questions about China's role Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Florida senators pushing to keep Daylight Savings Time during pandemic MORE’s (R-Fla.) decision to run for reelection is also helping the GOP’s chances.

Then came the year’s first presidential debate, and with it a string of problems for Trump.

After a poorly reviewed debate performance, the billionaire fell into a battle with a former Miss Universe whom he had criticized as “Miss Piggy” for gaining weight. On Saturday, The New York Times published a report that Trump took a $916 million loss on his 1995 tax returns, which might have allowed him to avoid paying federal income taxes for a total of 18 years.

Then came Ayotte’s comments, which seem likely to contribute to GOP gloom.

The overall race remains a tight one, with the fight for the Senate majority likely to come down to New Hampshire and four other states: Pennsylvania, Indiana, North Carolina and Nevada.

Democrats are confident they’ll gain seats in Illinois and Wisconsin.

If they can hold on to Nevada, they’d need to win two of the other four seats and retain the White House to take the majority. If they lose Nevada, they’d need to win three of the four.

The presidential race will be a huge factor, with Republicans hoping their candidates can outpace Trump if he falters down the stretch.

In Pennsylvania, a poll released Tuesday from Monmouth University found GOP Sen. Pat Toomey and Democrat Katie McGinty tied at 46 percent despite a 10-point lead in the state for Clinton over Trump.

A separate poll released Tuesday by Franklin & Marshall showed Toomey trailing McGinty by 6 points and Trump trailing Clinton by 9 points.

In North Carolina, GOP Sen. Richard Burr Richard Mauze BurrRep. Mark Walker says he's been contacted about Liberty University vacancy Overnight Defense: Trump rejects major cut to military health care | Senate report says Trump campaign's Russia contacts posed 'grave' threat Senate report describes closer ties between 2016 Trump campaign, Russia MORE has not managed to pull ahead of former state Rep. Deborah Ross (D), frustrating Republicans in Washington who wonder if he’s working as hard as he can.

An Elon University poll published Tuesday showed Clinton opening up a 6-point lead over Trump in North Carolina after a survey from two weeks ago showed them in a dead heat. Tuesday’s poll also showed Burr and Ross tied at 43 percent.

Ross reported raising $4.3 million in the third quarter and surprisingly outraised the incumbent over the first six months of the year. Meanwhile, the National Republican Senatorial Committee, which has much less money in the bank than its Democratic counterpart, did not make any independent expenditures in North Carolina last month.

Independent analysts say it will be extremely difficult for Republican Senate candidates to outperform Trump by more than 5 points.

“If Clinton matches or exceeds Obama’s 5-and-a-half spread in New Hampshire, Pennsylvania, that’s when it starts to get awfully tough,” said Kyle Kondik, a political handicapper at the University of Virginia Center for Politics.

He expressed skepticism over the GOP claim that Toomey could run as many as 8 points ahead of Trump.

“That just seems like an awful big margin given that voters aren’t as prone to split their tickets as they used to be,” he said.

Strategists on both sides say Nevada is emerging as the most important race in the country. If Republicans fail to capture the seat long held by retiring Senate Democratic Leader Harry Reid Harry Mason ReidOn The Trail: Battle over Ginsburg replacement threatens to break Senate Democrats fear Russia interference could spoil bid to retake Senate Graham signals support for confirming a Supreme Court nominee this year MORE, their chances of holding on to the majority fall dramatically. Nevada is the GOP’s only pickup opportunity.

“We have to win Nevada to have any chance of holding the majority,” said a Senate Republican strategist.

Republican Rep. Joe Heck (Nev.) is leading by 3 points, according to an average of recent polls compiled by RealClearPolitics, and Trump is tied with Clinton.

Democrats argue that Hispanic voters are usually under-represented in surveys of the state this far out from Election Day and are expecting a big, anti-Trump surge from the bloc that makes up about 20 percent of the electorate.

“Democrats have relentlessly tried to tie Trump to Heck,” Jon Ralston, a prominent Nevada-based political commentator, noted. “They believe if Hillary Clinton wins the state by more than 5 points it’s going to be very difficult for Joe Heck to win that race because it will mean that Hispanic turnout is very big.”

The Democratic candidate, former state Attorney General Catherine Cortez Masto, is running to become the first Latina elected to the Senate.

Non-partisan experts think Democrats are still likely to recapture the majority. But the Democratic wave that appeared to be forming when Trump was running roughshod through the GOP primaries has dissipated.

“I still think I’d rather be Democrats than Republicans. I still think that they can get a majority but just barely, which is a far cry from what we were talking about six months ago,” said Jennifer Duffy, senior editor at the nonpartisan Cook Political Report.