President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE on Wednesday downplayed a move by House Democrats to secure six years of his personal and business tax returns, the latest escalation in the party's efforts to probe the president's administration, campaign and business.

“Is that all?" Trump responded when notified Democrats had asked for six years of returns. "Usually it’s 10 so I guess they’re giving up."

The president told reporters in the Cabinet Room that he would not voluntarily release his tax returns, insisting that he remains under audit.

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“We’re under audit despite what people said, and we’re working that out," Trump said. "I’m always under audit it seems. But I’ve been under audit for many years because the numbers are big, and I guess when you have a name you’re audited."

House Ways and Means Committee Chairman Richard Neal Richard Edmund NealRep. Bill Pascrell named chair of House oversight panel Rep. Cedric Richmond set to join House Ways and Means Committee Coons beats back progressive Senate primary challenger in Delaware MORE (D-Mass.) on Wednesday evening formally requested copies of six years of Trump’s personal and business tax returns, covering 2013 to 2018. Neal set a deadline of April 10 for the IRS to turn over the documents.

"On behalf of the American people, the Ways and Means Committee must determine if that policy is being followed, and, if so, whether these audits are conducted fully and appropriately," Neal said of the IRS auditing a sitting president.

"In order to fairly make that determination, we must obtain President Trump’s tax returns and review whether the IRS is carrying out its responsibilities," he added.

Trump broke with decades of precedent during the 2016 presidential campaign when he refused to release his tax returns. The president and White House officials have insisted that his taxes are under audit, and therefore cannot be made public. The IRS has said that audits don’t prevent people from releasing their own tax information.

Democrats have asserted that Trump's tax returns could reveal potential conflicts of interest or improper financial dealings.

Trump's former personal attorney, Michael Cohen Michael Dean CohenA huge deal for campaign disclosure: Trump's tax records for Biden's medical records Our Constitution is under attack by Attorney General William Barr Eric Trump says he will comply with New York AG's subpoena only after Election Day MORE, testified before a House panel in February that he doubted the president is under audit as he's claimed. Cohen further alleged that Trump had inflated and deflated his assets for insurance purposes.

Democrats are attempting to obtain Trump's taxes using a provision in the federal tax code that gives the chairmen of Congress’s tax committees the power to ask for any tax returns and return information and examine them in a closed session.

The statute says that the Treasury secretary “shall furnish” the documents, so long as they are reviewed in a closed session. But it’s unclear how quickly the IRS will respond and if they will provide Neal with the documents.