The city's only Republican congressman says he will vote no on the American Health Care Act.

Rep. Dan Donovan announced his decision in a press release Wednesday afternoon.

In the release, the congressman, who represents Staten Island and part of Brooklyn, said a New York State-specific Medicaid amendment weighed into his decision. The amendment exempted state counties outside of New York City from contributing to the state's Medicaid fund.

Donovan also said he opposes increases in insurance premiums for seniors.

The Staten Island Advance was the first media outlet to report that Donovan was voting no. The congressman published an op-ed in the newspaper explaining his decision.

The bill goes up for a vote in the House Thursday.

A White House official says about 20 GOP representatives are against it or undecided. It would take 22 of them, and universal opposition from Democrats, to block it.