That includes preventing Mamdani's plan to turn a city park in Lower Manhattan into affordable housing.
"Like a community space to come together, have some peace, get married, I highly recommend it," Carson Harold said.
Minutes earlier, Harold and Stephen Rosetti exchanged vows inside Elizabeth Street Garden in Nolita.
If Mayor Adams had his way, the garden would remain.
His administration has designated the garden as an official city park, which is a decision the incoming mayor resents.
"It is no surprise that Mayor Adams is using his remaining weeks and months to cement a legacy of dysfunction and inconsistencies," Mamdani said.
Mayor Adams had agreed to build affordable housing in the garden's place, but he pivoted from that in June.
Designating the garden as city parkland will now make it much harder to ever develop housing in its place.
The state legislature would have to become involved.
The Mamdani, who ran on affordable housing, hoped to get more than 100 apartments built.
"The actions that Mayor Adams has taken will now make it nearly impossible to follow through with that," Mamdani said.
For his part, Adams maintains he has done right by the city.
"If I were the incoming mayor and looking at the victories we had around housing, around public safety, around transportation, around economic recovery, around taking care of our young people of you know if it's not broke, don't try to fix it. try to use it," Adams said.
"They're at odds on the Elizabeth Street Garden and they may be at odds on other things," James Vacca, CUNY Political Science Professor, said.
Vacca is also a former city council member and says this may be indicative of a bumpy transition.
"Sometimes it doesn't go well. It serves the government and it serves people best when a transition is seamless," Vacca said.
Meanwhile, 3 other sites are being considered for significantly more affordable housing than the garden site would have provided.
The garden's co-founder is thrilled that the long-time efforts to save the garden seem to have worked, but is saddened that such a beautiful space has been in the crosshairs.
"I wish the garden wasn't dragged into politics. Politics can be very nasty," he said.
* Get Eyewitness News Delivered
* Follow us on YouTube
* More local news
* Send us a news tip
* Download the abc7NY app for breaking news alerts