Democrat Richard Neal, chairman of the House Ways and Means Committee, has asked the IRS to turn over six years' of the president's tax returns by the end of the day. The process is created to be walled off from White House interference, in part because of corruption that took place during the Teapot Dome scandal in the 1920s.
"I expect the secretary to honor our invitation to return so that the rest of these members have an opportunity to pursue their questions", she said.
"I think this committee would like to know if in those communications, the White House had expressed their desire to you or anybody else at Treasury what their views (are) or how you should act on this matter", Quigley said.
"I believe, based no our personal interaction, Senator, that you have a pretty good read on me as a person and I'll leave it at that", Rettig responded to Wyden bluntly.
Mnuchin said he personally has had no conversations with anyone in the White House about the request, and was not briefed on the contents of the prior conversations between Treasury and White House lawyers.
House Democrats are expected to soon send an second letter to the Treasury Department again requesting the returns, according to a congressional aide who spoke on the condition of anonymity because he was not authorized to speak publicly.
Neal last week asked Internal Revenue Service Commissioner Charles Rettig to hand over the president's filings.
Israel's Benjamin Netanyahu says he plans to annex settlements in West Bank
The Israeli prime minister was asked if he was familiar with the details of the USA plan, replying he knew "what should be in it". The West Bank is under Israeli military jurisdiction, although settlers are subject to civilian law, as Israeli citizens.
In the letter, Mnuchin references Neal's preparation for the request, writing that "you too have acknowledged the unprecedented nature of the request".
"Please do not instruct me as to how I am to conduct this committee", she warned.
Trump declined to release his records while running for president in 2016, breaking with decades of precedent. "I built a great company", he said.
He suggested Waters bang the gavel to adjourn the hearing.
"It is being reviewed by the legal departments and we look forward to responding to the letter", he said.
The latest phase in the battle over Trump's tax returns comes as the Democrat-controlled House steps up oversight of the President and his administration.
Mnuchin also clashed with committee chair Maxine Waters.
Trump has promised to release the returns after a conclusion of an audit, although independent legal experts have said that an audit would not bar him from doing so.
"While I'm under audit I would not give my taxes - there's no law whatsoever". But he has not provided information to substantiate that there is, in fact, an audit underway.
Presidential candidates since the Nixon administration have released their tax returns, but Trump has refused to do so.