House Democrats clamoring for Donald Trump’s tax information have eagerly awaited a newly passed New York law allowing limited access to the president’s state returns.

They’re about to be sorely disappointed.

House Ways and Means Chairman Richard Neal would be the only Democrat allowed by the new law to ask for the documents, but so far he has said he won’t do it.

Neal has said he fears that getting the state returns would bolster Trump administration arguments that Congress is on a political fishing expedition—and not, as Neal has claimed, overseeing the Internal Revenue Service’s annual audits of the...