Voters in New York City made a dramatic shift toward the Republican Party during the 2024 presidential election, according to one election map expert.

Steve Romalewski, the director for CUNY's mapping service at the Center for Urban Research, joined "Mornings On 1" Thursday, breaking down the 2024 election map of New York City, which he said leaned more in favor of Trump than ever before.

Despite losing New York state's electoral votes, Romalewski said Trump received about 100,000 more votes than he did in 2020. Map data in Manhattan showed he was up over 5%; over 11% in the Bronx; 6% in Brooklyn; about 11% in Queens and about 8% on Staten Island.

He noted that the city's historically Democratic-leaning areas showed less enthusiasm this cycle.

"When you look at presidential election result maps over the past several cycles, there are areas that always stand out with really solid Democratic support - the North Bronx and much of the Bronx in general, Southeast Queens, central Brooklyn, North Shore of Staten Island, much of Manhattan, Harlem especially - but not so much in this election," Romalewski said.

He suggested that the shift might reflect voter disinterest in Kamala Harris, the Democratic candidate, rather than a surge of new support for Trump.

"It was a combination of a movement toward Trump, but also fewer votes for Harris, and that really changed things. For example, on Staten Island, Trump only got 1,000 more votes than in 2020. Harris got almost 25,000 fewer votes," Romalewski said. "And so when you look at those red areas that got more red, it's not so much that it got more red because more people turned out for Trump, but people stayed home for Harris."

As New York City looks toward its 2025 mayoral election, Romalewski said these patterns could provide insights, though not definitive predictions.

"These vote patterns don't necessarily translate into the next election, but they're tea leaves," he said.