New York mayoral candidate Zohran Mamdani rallied supporters Sunday with heavyweight support from U.S. Sen. Bernie Sanders and Rep. Alexandria Ocasio-Cortez as the race enters its final stretch, telling a raucous crowd that "New York is not for sale."

Mamdani, the Democratic nominee, took the stage at a small stadium in Queens where he and two of the nation's leading progressives pitched his candidacy as a force to take on billionaires and “oligarchs” who have thrown money and support behind his opponents.

As the crowd chanted his name, Mamdani reiterated plans to hire thousands of new teachers, renegotiate city contracts, freeze rent increases for the city’s 1 million rent-regulated apartments, build more affordable housing and provide universal child care.

With early voting underway ahead of Election Day on November 4, Mamdani, a democratic socialist, is in an increasingly caustic race with former Gov. Andrew Cuomo, who is running as an independent candidate after losing the Democratic primary to Mamdani, and Republican Curtis Sliwa, who campaigned Sunday in Queens.

Cuomo has sought to cast Mamdani, a 34-year-old state assemblymember, as a naive candidate whose agenda would damage the city.

In a radio interview Sunday morning, Cuomo argued that he is the real Democrat in the race while saying Mamdani's democratic socialism would result in an exodus of residents and businesses.

Sanders and Ocasio-Cortez have supported Mamdani's campaign for months including before the Democratic primary in June.

On Sunday they cast Mamdani as an antidote to what they called the creeping authoritarianism of President Donald Trump's administration.

"And we will send a loud message to President Donald Trump that his authoritarianism is no good here," Ocasio-Cortez said.