Mamdani celebrates victory in 'reborn' New York City

As Zohran Mamdani turns from campaigning to governing, a source close to the mayor-elect told ABC News he is intent on reaching out to New Yorkers who did not vote for him and send a strong signal that he plans to be a mayor for all New Yorkers.

That will be a focus of his transition in the coming days and weeks in meetings with civic, political and business leaders, the source said.

He also plans to send a signal to New Yorkers who have concerns about his relative youth and lack of experience with the appointments to his administration, the source told ABC News.

As for the national stage, Mamdani's focus will be on pushing back on Trump's efforts to impose his will on the city, according to the source.

But, the source said, he also recognizes that his victory could offer Democrats a blueprint to win back a "multi-racial and working class" coalition across the country.

-ABC News' Ben Siegel

California voters have chosen to redraw their state's congressional map in the middle of the decade and to temporarily sideline the state’s independent redistricting commission, according to ABC News' projection that California’s Proposition 50 (Prop 50) will pass -- which could have major implications for the 2026 midterms.

The proposition being projected to pass gives Democrats their first major win during the ongoing mid-decade redistricting wars across the country. Gov. Gavin Newsom proposed the ballot measure after Texas Republicans, encouraged by President Donald Trump, revised their maps in a rare mid-decade redistricting move that could allow Republicans to gain five seats in 2026.

-ABC News' Oren Oppenheim

Polls are now closed in California, where voters are weighing in on a ballot initiative, "Proposition 50," to determine if the state will adopt a new congressional map that redraws five districts to be more Democratic-leaning, potentially allowing Democrats to flip them in the midterms.

Senate Minority Leader Chuck Schumer, a New Yorker who consistently declined to say if he would endorse Democratic candidate Zohran Mamdani for mayor of New York City, wrote in a post on X late Tuesday, "I congratulate @ZohranKMamdani on his well-earned & historic victory. We have worked together on a number of vital issues — like delivering historic debt relief for taxi drivers. I look forward to building on that partnership to keep NYC strong, fair, more affordable & thriving."

-ABC News' Oren Oppenheim