City Comptroller Scott Stringer plans to audit the city Board of Elections following reports of voting problems in Brooklyn.
The board has confirmed reports that more than 125,000 Brooklyn voters were removed from the rolls.
Officials say blocks and buildings were purged from voting records, and some people reported having trouble getting into polling sites.
Stringer says he is going to investigate to find out why the Board of Elections is "consistently disorganized, chaotic and inefficient".
But elections officials are disputing Stringer's remarks.
"We're finding that the issues associated with the voting process today were routine issues that we confront in every election. This talk about mass problem and widespread difficulty from our travels and travails don't really seem to be out there in quite the way that people are saying," said NYC Board of Elections Executive Director Michael Ryan.
Despite their claims, the BOE says it will comply with the investigation.
Mayor Bill de Blasio also says he supports Stringer's audit and is calling for reforms.