Spin Cycle

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ALBANY — Zephyr Teachout and her underdog campaign to take on Gov. Andrew M. Cuomo in the Democratic primary snagged another endorsement once expected to go to Cuomo.

The York Chapter of the Sierra Club endorsed Teachout on Monday. She is a Fordham law professor who strongly opposes drilling for natural gas trapped in a vast upstate shale deposit.

The primary is Sept. 9.

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Cuomo has declined to authorize or reject the drilling by a method called hydraulic fracturing, or fracking. For Cuomo, it’s a politically dicey proposition because many upstate communities he hopes to win see fracking as a potential economic boon. But environmentalists in Cuomo’s base of voters strongly oppose fracking as a threat to the environment and public health.

Fracking is strongly supported by the energy industry.

“Ms. Teachout is an articulate, engaging leader who will play a critical role in the resurgence of the Empire State, with a vision to rebuild New York through a robust clean energy economy and reinvigorate our democracy so that it works for everyone — not just the wealthy and well-connected,” said Jeff Bohner of the Sierra Club Atlantic Chapter.

The chapter has 38,000 members.

Last week, Teachout received the endorsement of the Public Employees Federation, the state’s second-biggest union of public workers. On Monday, Teachout was also endorsed by the New York State chapter of the National Organization for Women, which had long supported Cuomo.