Former Mayor Ed Koch has been moved into intensive care, his spokesman said.
Billionare John Catsimatidis launched his bid for mayor Tuesday.
Former President Bill Clinton dismissed talk that his wife would make a good mayor.
Stringer has been spending more time outside of Manhattan while preparing for a citywide campaign.
Koch is expected to be released as soon as Wednesday following a blood transfusion.
The mayor offered a near-endorsement of City Council Speaker Christine Quinn's expected mayoral campaign.
The 30 Rock star compared the mayoral hopefuls to a date who's trying to get his hands up your blouse.
City Comproller John Liu's poll numbers have sunk after allegations of campaign financing fraud.
Manhattan Borough President Scott Stringer, Public Advocate Bill de Blasio and former Comptroller Bill Thompson shared their visions of the "Future of New York City" during a panel discussion Wednesday.
John Haggerty was found guilty of second-degree grand larceny and money laundering for stealing from Mayor Michael Bloomberg on Friday.
Mayor Michael Bloomberg's poll numbers are sagging, according to a new Quinnipiac poll.
President Barack Obama expressed understanding towards the Occupy Wall Street protesters' grievances, while Mayor Michael Bloomberg defended the NYPD Thursday.
Police Commissioner Ray Kelly may never have expressed interest in the job, but he tops the list of city officials New Yorkers would like to see as the next mayor in a new poll.
Mayor Michael Bloombrg capped off a day of celebration by officiating the wedding at Gracie Mansion.
Alec Baldwin is "definitely more than just thinking" about running to be New York's mayor, his brother, Daniel, told Piers Morgan Friday.
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