Earlier in the day at another hearing, Treasury Secretary Mnuchin had been pressed on the exact same subject - who should make the call on the release of the President's tax returns.
"I have not spoken to the White House Chief of Staff or the President about this decision," Mnuchin told lawmakers, shedding little light on the ultimate decision.
While Mnuchin made clear that he was the supervisory boss of the IRS Commissioner, the Treasury Secretary would not say how the tax return request would be handled.
In both hearings, GOP lawmakers again made clear their displeasure with the request from Democrats.
"We have a chairman and potentially a party that is attempting to weaponize the IRS for political gain," said Rep. Tom Graves (R-GA).
Under federal law, three Congressional committees are authorized to ask the IRS for specific tax returns of any individual - what's known as Section 6103(f), which specifically says the Secretary of Treasury "shall furnish such committee with any return or return information specified in such request."
"It is our intent to follow the law, and that is in the process of being reviewed," Mnuchin said.
But with the President making it clear he would not turn over his tax returns, it wasn't clear that Mnuchin would be handing over those documents.