(Business Insider) In late February, Lindsey Boylan, a former adviser to New York Gov. Andrew Cuomo, received a pointed email from a powerful acquaintance.

The sender, a prominent Democratic party donor and activist, told Boylan that her plan to run for the Democratic nomination against incumbent Rep. Jerry Nadler of New York was a lost cause, and that she may have already “seriously impaired” her political future by simply considering the challenge.

The message — a common one communicated by establishment figures to primary challengers, if not normally in writing — alarmed Boylan, but also hardened her resolve, she said.

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