Former President Barack Obama called New York City Democratic mayoral candidate Zohran Mamdani on Saturday to praise his campaign and offer to be a "sounding board" in the future, two sources confirmed to ABC News.

Former President Obama reached out to Democratic socialist Zohran Mamdani ahead of the NYC mayoral election against Andrew Cuomo and Curtis Sliwa.

Former President Barack Obama told Zohran Mamdani “your campaign has been impressive to watch,” and suggested that he was invested in Mr. Mamdani’s success beyond the election.

Former President Barack Obama was as close as North Jersey but still only talked by phone with New York City mayoral frontrunner Zohran Mamdani over the weekend — and withheld endorsing him.

According to an Atlas poll, Zohran Mamdani was leading the mayoral race with 40 percent of the vote, compared with

Officials counters suggesting that Barack Obama endorse Zohran Mamdani for the NYC mayoral election even though they've engaged in multiple phone calls over the contest.

During the call between Barack Obama and Zohran Mamdani, the former President offered to serve as a “sounding board” for the candidate.

Former President Barack Obama spoke with New York City mayoral candidate Zohran Mamdani on Saturday, days before Tuesday’s general election. The call between Obama and the democratic socialist frontrunner comes as several prominent Democrats have kept their distance from Mamdani’s campaign.

A video of a recent address by Zohran Mamdani, the Democratic mayoral candidate, has been viewed more than 25 million times.