New York officials on Tuesday moved to sue the federal government over the 2017 tax law that caps state and local tax deductions at $10,000.

Gov. Andrew Cuomo announced the lawsuit, long in the planning stages since he first threatened it when the measure was being approved seven months ago, pointing to protections for states in the U.S. Constitution.

“This is their political attempt to hurt Democratic states,” Cuomo said. “It is totally repugnant and hypocritical of the conservative ideology that they preached which is limited federal government and protect states’ rights.”

Cuomo repeatedly called the tax law, as well as additional Trump administration’s actions on responding to Puerto Rico’s storm damage, immigration policies and the president’s appearance at a press conference with Russian President Vladimir Putin as “repugnant” and “un-American.”

The suit was simultaneously announced by Attorney General Barbara Underwood, who called the cap on tax deductions an attempt to bully New York.

“This cap is unconstitutional – going well beyond settled limits on federal power to impose an income tax, while deliberately targeting New York and similar states in an attempt to coerce us into changing our fiscal policies and the vital programs they support,” she said.

The limit on state and local tax deductions impacts high-tax states like New York, California and New Jersey, and property taxpayers in especially high-tax areas, like the New York City area.

State lawmakers earlier this year approved legislation meant to soften the cap on the deductions through contributions to non-profit entities, though those provisions are being reviewed by the IRS.

Cuomo has railed against the Trump administration for the last year and has threatened to file a legal challenge to any effort that would repeal the Roe v. Wade decision.

In the call, Cuomo excoriated Trump for his comments made at the Helsinki press conference, in which the president sided with Putin’s denials of having anything to do with efforts to inject false reports and hack emails of Democratic officials during the 2016 presidential election.

On Tuesday, Cuomo stopped short when asked if there are grounds to either censure or impeach the president at this point.

“I’ll leave that to the Republican Senate and the Republican Congress,” he said. “I think he stepped over the line yesterday that at a minimum they should have stepped up and condemned what he said. The silence was deafening from the Republicans yesterday.”

Later in the call, Cuomo went further, suggesting that Congress may review whether Trump committed treason.

“At one point you have to put the responsibility of the citizenry above political loyalty,” he said, adding, “I think they are going to have a real issue about whether the president’s actions were treasonous.”