City Council Speaker Christine Quinn formally launched her bid for mayor Sunday morning, with a post on her Twitter feed.
"It's official: I’m running for mayor to fight for the middle class," Quinn said in the message, which included a link to a video on her website of her introducing herself to voters.
"Together, we can keep our streets safe, improve our schools, provide affordable housing and create good paying jobs in all five boroughs," she tells voters on the site.
Quinn has established herself as the early frontrunner in a crowded field of Democratic candidates that includes Public Advocate Bill de Blasio, Bill Thompson, the former comptroller — who narrowly lost to Mayor Michael Bloomberg in 2009 — and current Comptroller John Liu.
The latest poll showed Quinn closing in on the "magic" 40 percent she needs to
win to avoid a runoff with another candidate in the primary, with 37 percent of Democrats surveyed saying they'd vote for her if the primary were held today.
Quinn, who began her career as a housing organizer, would become the city's first female mayor and openly gay mayor.
Quinn will kick off the campaign with a walk-and-talk tour across the five boroughs, beginning Sunday morning.