Story highlights Mulvaney disputes analysis saying the plan would raise rates for many over the next decade

He says he is not concerned with how the bill affects Trump

Washington (CNN) White House budget director Mick Mulvaney pledged Wednesday night that President Donald Trump would reject a tax proposal that raised taxes for the middle class.

"If our numbers here at the White House actually show the same thing, if they show that taxes are going up on the middle class, on the House plan, on the Senate plan, on some combination of the two, we won't sign it," Mulvaney said in an interview on CNN's "Erin Burnett OutFront."

Mulvaney was responding to the most recent analysis from the Tax Policy Center saying the GOP legislation would cause at least a quarter of taxpayers to see an increase in their tax payments over the next 10 years.

Mulvaney said he disagreed with the analysis, but reiterated Trump is seeking a plan that establishes lower taxes for the middle class, makes it easier to file taxes and lowers the corporate tax rate.

Trump on Tuesday claimed he would personally have a higher tax bill under GOP reforms. However, the President has refused to release his tax returns, making such a claim unverifiable.

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