Cuomo's comeback announcement got significantly ratioed by Mamdani's reply, which also raked in lots of new donations for the Democratic mayoral nominee.

In the weeks since the primary, several prominent donors who had been supportive of Cuomo pledged their support to Adams in the general election, including billionaire hedge-fund managers Dan Loeb and Bill Ackman, both of whom have become so entwined with the Adams operation that they have helped vet campaign hires.

Mamdani responded to the news on X with a message that criticized both Cuomo and incumbent Mayor Eric Adams, who is also running a third-party bid in the fall.