President Donald Trump said he doesn't want current and former staffers to testify before congressional committees, pointing to the White House's cooperation with special counsel Robert Mueller's investigation as evidence that he's already done enough.

In a Tuesday interview with The Washington Post, Trump argued that "there's no reason to go any further" when it comes to Congress' requests to question White House aides, calling the legislative body "very partisan." He said that he hasn't made a final decision about asserting executive privilege to block Democrats' requests for congressional testimony.

"I don't want people testifying to a party, because that is what they're doing if they do this," Trump told the Post.

"I allowed my lawyers and all the people to go and testify to Mueller – and you know how I feel about that whole group of people that did the Mueller report," he added. "I was so transparent. They testified for so many hours. They have all of that information that's been given."

Trump's comments come as Congress issues subpoenas for testimony from past and present staffers, setting up a showdown between Democratic committee chairs and the White House. In the wake of Mueller's redacted report, Democrats are ramping up investigations to further examine the special counsel's findings.

But in Tuesday's interview, Trump asserted that Democrats should be pleased with the testimony from aides to federal investigators during the nearly two-year investigation into Russion interference in the 2016 election and whether Trump obstructed justice. Mueller's report concluded that there was no conspiracy between Russia and Trump's campaign. While the report didn't conclude that Trump obstructed justice, it also did not exonerate him.

The White House is reportedly planning to use executive privilege to fight a subpoena from the House Judiciary Committee for former White House counsel Donald McGahn to testify about Mueller's report. McGahn was heavily mentioned in the report, which detailed Trump pushing him to fire the special counsel, which McGahn refused to do.

And the White House instructed former White House personnel security director Carl Kline to not to appear before the House Oversight Committee, which is now considering a vote to hold Kline in contempt for missing his Tuesday deposition to answer questions about security clearances.

The contentious fight between the legislative and executive branches has also played out over obtaining Trump's tax returns. Earlier this month, House Ways and Means Committee Chairman Richard Neal gave the IRS a second deadline to hand over six years of Trump's tax documents.

But the department missed the 5 p.m. deadline set by the Democratic representative from Massachusetts on Tuesday, with Treasury Secretary Steven Mnuchin writing to Neal that his team will make a final decision by May 6.

