Treasury Secretary Steven Mnuchin on Tuesday said tax reform is President Donald Trump‘s top priority, assuring that the administration will pass a tax overhaul.

Republicans aim to overhaul the American tax code but have faced various hurdles in their goal of passing a tax reform bill this year. Mnuchin has recently held to the goal, despite the fact that Congress and the White House have not yet released a tax reform plan.

On Thursday, the Senate Finance Committee will hold a hearing on individual tax reform. Sen. Orrin Hatch, the committee’s chairman and one of the six primary tax negotiators, said he expects to share the plan with other lawmakers after that and other hearings.

On Friday, Trump urged lawmakers to push forward with tax legislation “ASAP,” telling them not to wait until the end of September. Tax reform is one of the key planks of the agenda he pitched as a candidate, and he has made two recent speeches touting the benefits of changes to the tax system without offering new details.

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