more offshore wind turbines than any other country by the start of this year but had manufactured only a small portion of the equipment.

2017 report indicated that the country manufactured well below 30 percent of its offshore wind equipment,and Mr. Roberts said the percentage had probably increased slightly since then. The country currently manufactures blades but no nacelles.

All of which leaves the Biden administration with a difficult choice: If it genuinely wants to shift manufacturing to the United States, doing so could require some aggressive prodding. A senior White House official said the administration was exploring ways of requiring that a portion of wind and solar equipment be American-made when federal money was involved.

But some current and former Democratic economic officials are skeptical of the idea, as are clean-energy advocates.

“I worry about local content requirements for offshore wind from the federal government right now,” said Kathleen Theoharides, the Massachusetts secretary of energy and environmental affairs. “I don’t think adding anything that could potentially raise the cost of clean energy to the ratepayer is necessarily the right strategy.”

Mr. Master said the recent legislation in New York was a victory given the difficulty of enacting stronger domestic content policies at the state level, but acknowledged that it fell short of his union’s goals. Both he and Ms. Fahy vowed to keep pressing to bring more offshore wind manufacturing jobs to New York.

“I could be the queen of lost causes, but we want to get some energy around this,” Ms. Fahy said. “We need this here. I’m not just saying New York. This is a national conversation.”

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