Rep. Jerry Nadler will defeat fellow Rep. Carolyn Maloney in a bitter House primary

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 that has long locked New York Democrats in the battle for the heart of Manhattan, NBC News expects. 

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 The two legislators are at loggerheads after a revised district map allowed them to contest the same parliamentary seat.

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  Nadler, 75, and Maloney, 76, represented parts of the island for about three decades. 

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 Both have powerful seats in Congress: Nadler is the chairman of the House Judiciary Committee,

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 while Maloney heads the House Oversight Committee. 

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  Nadler's congressional district includes the Upper West Side, while Maloney covers much of Manhattan's east side

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 But their respective regions were united in May, due to poor and highly contested media Nadler

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 and Maloney announced they will run for the newly created 12th Congressional District. Suraj Patel,

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 who challenged Maloney in the previous two primary elections, is also in the polls. Despite their long history, the main battle between Nadler and Maloney was anything but close.