"I was given chances I just don't see for New York's kids today", Nixon said in the video.
She has also been a very dedicated anbd loyal surrogate for a number of politicians, particularly Mayor de Blasio and former Secretary of State Hillary Clinton.
She has never run for elected office (sound like someone we all know?) and will take on two-term Gov. Andrew Cuomo in the Democratic primary. Forty-eight percent said Cuomo should be re-elected and 46 percent said "someone else". Cuomo is running for his third term in NY with a $30 million war chest at his disposal for the campaign.
At one point, there is footage of her walking down an NYC street with her voice-over: "I love NY". "I'm a proud public school graduated, and a prouder public school parent".
A Siena College poll released Monday finds that Cuomo is far ahead of Nixon, leading her among Democrats, says Siena's Steve Greenberg.
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She's a hard-working activist who's more than her famous characters, supporters like Rosie O'Donnell said. If successful in both the primary and general elections, Ms Nixon would become New York's first female and first openly gay governor. Her announcement included a video of her with her family, including wife Christine Marinoni and their son, Max. The poll also favors Cuomo over the two main GOP contenders, Dutchess County executive Marcus Molinaro and Syracuse Sen.
"Cuomo has the support of a small plurality of independents against either and strong support from downstate voters, while upstate voters are closely divided between Cuomo and either Republican".
In 2014, the party was split between Cuomo and Teachout, but ultimately choose Cuomo after he vowed to forward progressive policies in his second term - including helping Democrats win control of the state Senate, which hasn't happened.
"Many concerned New Yorkers have been encouraging Cynthia to run for office, and as she has said previously, she will continue to explore it", Nixon spokeswoman Rebecca Sides Capellan said earlier in March.
Jon Campbell and Joseph Spector write for Gannett's Albany (N.Y.) Bureau.