Just How Competitive Is the New York Primary?
Mrs. Clinton fares especially well in the New York City suburbs, where her lead is almost 20 points, and she maintains a 13-point lead in the five boroughs, but that is down from her 24-point advantage in early February.
In 2008, when Mrs. Clinton ran for president against Senator Barack Obama, she won every borough. The race was closest in Brooklyn, the most populous borough and where both Mr. Sanders and Mrs. Clinton have campaigned hard.
White voters, though, have been crucial to Mr. Sanders’s success, and they make up a minority of Brooklyn residents, as they do in Queens and the Bronx.
Statewide, where about one-third of all residents are black or Latino, the candidates’ patterns of support appear familiar. Mrs. Clinton leads by about 2-to-1 with black voters, and by a slimmer 12-point margin among Latinos, according to the Siena poll. She holds an almost 20-point lead among women. The rivals are effectively tied among whites and among men.
Though Mr. Sanders would be the first Jewish presidential nominee, Mrs. Clinton pulls some of her strongest support from New York’s Jewish voters, six in 10 of whom back her. Mr. Sanders does best with those who do not identify as Roman Catholic, Protestant or Jewish; he takes a slim majority of these voters.
http://www.nytimes.com/politics/first-draft/2016/04/13/poll-watch-just-how-competitive-is-the-new-york-primary/
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this time around. 
