Mamdani celebrates victory in 'reborn' New York City

President Donald Trump and California Democratic Gov. Gavin Newsom are sparring over the vote on Proposition 50, the ballot proposition where Californians are deciding if the state will adopt a new Democratic-friendly congressional map in response to mid-decade redistricting in Texas.

On social media, Trump laid into the proposal as a "GIANT SCAM" and that voting process itself is "rigged."

"The Unconstitutional Redistricting Vote in California is a GIANT SCAM in that the entire process, in particular the Voting itself, is RIGGED. All 'Mail-In' Ballots, where the Republicans in that State are 'Shut Out,' is under very serious legal and criminal review. STAY TUNED!" Trump wrote.

Newsom hit back on X: "The ramblings of an old man that knows he's about to LOSE."

Democrats feel particularly bullish about their chances in California tonight.

-ABC News' Brittany Shepherd

As voters head to the polls, various Republican groups have released statements and memos attacking New York City Democratic mayoral nominee Zohran Mamdani, as the Republican Party continues to tie the self-described democratic socialist to the broader Democratic Party as a way to paint Democrats as radical and out of touch.

The messaging, while not new, reflects how the Republican Party hopes to use Mamdani as an albatross against Democrats.

The National Republican Congressional Committee, in a memo released on Tuesday morning framing Republicans as having more momentum one year out to the 2026 midterms, claimed that Democrats are fully on board with "the socialist agenda."

"Democrats are now fully embracing the socialist agenda, with Hakeem Jeffries endorsing radical socialist Zohran Mamdani just last week," the committee wrote, calling this "electoral poison for Democrats" because Democrats view socialism more negatively than capitalism.

Additionally, the National Republican Senatorial Committee -- the campaign arm of Senate Republicans -- sent out a flurry of at least seven memos early Tuesday tying Democratic primary candidates in key Senate races to Mamdani.

In a press release on Monday, the Republican National Convention grouped Mamdani with the two Democratic gubernatorial candidates in New Jersey and Virginia, saying they "are all cut from the same far-left cloth."

-ABC News' Oren Oppenheim, Brittany Shepherd and Emily Chang

While casting his vote for himself on Tuesday morning, independent candidate for mayor of New York City and former Gov. Andrew Cuomo said President Donald Trump does not support him but "opposes Zohran Mamdani."

"The president does not support me. The president opposes Zohran Mamdani," Cuomo said when asked if he accepts Trump's recent endorsement.

Cuomo was also asked what's at stake nationally in this election, to which he told reporters, "I think what you're seeing is a civil war in the Democratic Party that has been growing for a while."

The former governor said Trump believes Mamdani is an "existential threat" and that the "momentum is on our side."

-ABC News' Halle Troadec

As Election Day unfolds, here are the latest numbers on many people voted early in the states and cities with key races.

New York mayoral election: Over 730,000 people (735,317) have voted early in New York City's 2025 mayoral election as of the end of early voting, according to the New York City Board of Elections.

New Jersey gubernatorial election: Over 1.3 million (1,359,769) ballots have been cast early in-person or returned by mail as of data available by the end of Monday, according to data compiled by the Associated Press.

Virginia gubernatorial election: Over 1.4 million (1,448,286) ballots have been cast early in-person or returned by mail as of noon Monday, according to data compiled by the Associated Press.

California's Prop 50: Over 6.4 million (6,433,997) ballots have been cast in advance as of Sunday afternoon, according to data compiled by the Associated Press.

-ABC News' Oren Oppenheim