Ms Ocasio-Cortez, a former Bernie Sanders volunteer from a Puerto Rican family, won with 57.5 percent of the vote.
Political analysts see her 15 percentage point victory as the biggest political upset since Republican House Majority Leader Eric Cantor lost in 2014 to a little-known right-wing professor, Dave Brat.
Democratic leaders carefully parted ways with her on Wednesday on her support for Medicare for all, and the elimination of the Immigration and Customs Enforcement (ICE). "Working-class Americans want a clear champion and there is nothing radical about moral clarity in 2018".
The 28-year-old Ocasio-Cortez, a Bronx native, spent several of her formative years in Boston.
Unlike Jealous, whose campaign was boosted by appearances by Sanders, Cory Booker, and Kamala Harris-"I have a lot of friends who could be running for president in 2020", Jealous told the Times-or her opponent, who was backed by such normally progressive unions as the Communications Workers of America, DC 37, and the Amalgamated Transit Union, Ocasio-Cortez got only lip service.
Clyburn of SC also said he didn't think Crowley needs to step aside, even though the Democratic Caucus is gearing up for a midterm election effort to take back the House that Crowley will no longer have an individual stake in.
She led a boldly progressive campaign, supporting universal healthcare, tuition-free college and criminal justice reform. Ocasio-Cortez didn't shy away from calling out Crowley on Twitter, saying he "sent a woman with a slight resemblance to me as his official surrogate to last night's debate".
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Lopez-Pierre admits he has never spoken to Ocasio-Cortez.
"We talked to people throughout the Midwest, visited Flint, Michigan; and finally ended our trip with a stay at Standing Rock", she said, referring to the protest against the Dakota Access Pipeline in North Dakota.
During her campaign, she criticised Mr Crowley for his ties to Wall Street and accused him of being out of touch with his increasingly diverse constituents.
But he's not surprised a socialist platform appeals to voters in New York's 14th District.
She has repeatedly rejected the supposed divide between economic concerns and "identity politics", a frequently invoked diagnostic tool for Democratic races, as a false dichotomy.
In their years living on the sixteenth floor of the Warren Towers dormitory, former classmate Mina Vahedi knew Ocasio-Cortez had what it takes. When she learned she beat the incumbent candidate, the shock was written all over face. "So let me reject that right now", Pelosi said.
"She is the ideal intersectional candidate", said Nomiki Konst, an adviser to the Sanders-backed progressive group Our Revolution. Yet Mr Crowley's loss suggests Democrats must overcome intra-party divisions if they hope to take control of Congress and key governors' offices nationwide.
"I never really saw myself running on my own", she told NY magazine "I counted out that possibility because I felt that possibility had counted out me".