Less than 24 hours before the polls open in New York, Hillary Clinton’s campaign tried to downgrade expectations of a huge victory by predicting a less-than-overwhelming margin in Tuesday’s presidential primary.

“I think the margin will be a little tighter than people expect,” campaign spokesman Brian Fallon told CNN on Monday.

This despite a new poll from Emerson College showing Clinton maintaining a healthy lead against Bernie Sanders, 55 percent to 40 percent.

Analysts said Clinton needs to win New York by double digits to prevent Sanders from portraying her victory as a defeat.

“For her to show that she is solid in her adopted state, 10 points or better should be a good number. For Bernie, if he does 8 or 9, I wouldn’t count it as a victory, but he will say it was a moral victory,” said Democratic political consultant George Arzt.

Sanders claims he can win outright if there’s a large turnout.

But the Vermont senator planned to spend Tuesday in Pennsylvania, which holds its primary April 26, a sign he is not counting on that scenario.

Jerry Skurnik, a political consultant who monitors turnout statistics, said he expects about 1.5 million of the state’s 5.3 million registered Democrats to vote.

In 2008, more than 1.8 million Democrats cast ballots in the New York primary, and Clinton beat then-Sen. Barack Obama, 57 percent to 40 percent.

Clinton spent Monday crisscrossing the Big Apple and its suburbs.

In Yonkers, she talked to about 100 cafeteria workers at St. John’s Riverside Hospital, bashing the Republican presidential contenders for their stances on immigration, and posing for selfies with staffers.

“And contrary to Senator [Ted] Cruz, I think New York values are American values,” she said to cheers.

Clinton later met with Sen. Charles Schumer at Kung Fu Tea in Flushing, Queens, where she ordered bubble tea and chatted with customers.

She also spoke with a few dozen workers at Hi-Tek Car Wash in Elmhurst, Queens, congratulating them for recently joining a union.

And she held an afternoon rally at the New York Hilton in Midtown with former US Rep. Gabby Giffords, who survived a shooting, and Sen. Kirsten Gillibrand, who have become fierce advocates for gun control.

The crowd numbered in the hundreds, whereas Sanders routinely attracts thousands to his rallies.

Sanders, meanwhile, noshed on eggs, home fries and toast at the Evergreen Diner on West 47th Street near Times Square for the second time in recent days.

But restaurant manager John Argenis, 58, was not impressed.

“I’m not voting. I don’t like them [politicians]. I’m too busy. I didn’t have time for that. I respect him as a candidate and that’s about it,” he said.

While Sanders was on the campaign trail, strolling along Sixth Avenue to attend a rally with striking Verizon workers, his aides were complaining to the Democratic National Committee that Clinton’s Friday night fundraiser in California with actor George Clooney “skirts legal limits.”

Event organizers reported getting individual contributions as high as $353,400 or more, “which is over 130 times the $2,700 limit that applies for contributions to Secretary Clinton’s campaign,” Sanders aides charged.

Clinton campaign chief Rob Mook responded angrily, “As Senator Sanders faces nearly insurmountable odds, he is resorting to baseless accusations of illegal actions and poisoning the well for

Democratic candidates up and down the ticket.”

Hillary’s history of flip-flopping

Additional reporting by Jazmin Rosa