McGahn subpoena fight to test limits of executive 'immunity'

The impending court battle over a congressional subpoena for President TrumpDonald John TrumpMarine unit in Florida reportedly pushing to hold annual ball at Trump property Giuliani clashes with CNN's Cuomo, calls him a 'sellout' and the 'enemy' Giuliani says 'of course' he asked Ukraine to look into Biden seconds after denying it MORE’s former White House counsel Don McGahn is about to test the concept of “immunity” for top presidential advisers, which has been invoked by both Republican and Democratic administrations but hardly tested in courts.

Legal experts say the outcome of a court battle between the House Judiciary Committee and the White House over McGahn documents and testimony could have significant implications for the powers of Congress and the executive branch.

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The court fight could take months, even years, to resolve, further frustrating House Democrats as they seek to follow investigative threads from former special counsel Robert MuellerRobert (Bob) Swan MuellerLewandowski says Mueller report was 'very clear' in proving 'there was no obstruction,' despite having 'never' read it Fox's Cavuto roasts Trump over criticism of network Mueller report fades from political conversation MORE’s Russia probe.

The Trump administration says McGahn and other White House advisers are “absolutely immune” from compelled congressional testimony about their work in the West Wing, arguing the concept is rooted in the constitutional separation of powers and has been affirmed by past administrations, including as recently as the Obama White House.

Under the standard of immunity, the administration argues that current and former staffers aren't required to disclose what took place in the White House, pointing to the confidential protections offered to the executive branch.

“This long-standing principle is firmly rooted in the Constitution’s separation of powers and protects the core functions of the Presidency, and we are adhering to this well-established precedent in order to ensure that future Presidents can effectively execute the responsibilities of the Office of the Presidency,” White House counsel Pat Cipollone wrote in a letter to Judiciary Chairman Jerrold NadlerJerrold (Jerry) Lewis NadlerPelosi: Lewandowski should have been held in contempt 'right then and there' Nadler's House committee holds a faux hearing in search of a false crime Lewandowski says he's under no obligation to speak truthfully to the media MORE (D-N.Y.) in May. 

But Democrats say the assertion has no basis in law and is therefore moot, and that the White House is leveraging the argument in a sweeping fashion in order to defy their investigative pursuits.

“It’s been pulled out of a hat,” said Rep. Jamie RaskinJamin (Jamie) Ben RaskinDemocrats bicker over strategy on impeachment Overnight Defense: Trump says he has 'many options' on Iran | Hostage negotiator chosen for national security adviser | Senate Dems block funding bill | Documents show Pentagon spent at least 4K at Trump's Scotland resort Top Oversight Democrat demands immigration brass testify MORE (D-Md.), a member of the Judiciary panel. “Presidential lawyers citing presidential lawyers from the past does not make judicial precedent. The kind of precedent we are willing to follow is precedent that comes from the courts.”

White House lawyers blocked former Trump communications director Hope HicksHope Charlotte HicksTrump: 'Top shows' on Fox News, cable are 'Fair (or great)' to me Trump criticizes Fox, which 'isn't working for us anymore' Sarah Huckabee Sanders becomes Fox News contributor MORE from answering more than 150 questions during an interview behind closed doors on June 19 by asserting her immunity from testimony — an episode that infuriated Democrats, who now believe the transcript of her testimony demonstrating the White House’s objections will strengthen their argument in court.

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Judiciary panel Democrats say Nadler could file a lawsuit in the D.C. District Court as soon as next week to force McGahn to testify.

Trump instructed McGahn to resist his subpoenaed appearance in May, citing a newly minted Justice Department Office of Legal Counsel opinion stating, “Congress may not constitutionally compel the President’s senior advisers to testify about their official duties.”

The opinion cites a 1971 memo written by then-Assistant Attorney General William Rehnquist during the Nixon administration as first laying out the legal basis for immunity as well as several executive branch opinions written thereafter.

“The White House has opposed sending senior advisers to testify for almost as long as there has been an Executive Office of the President,” the opinion states.

There is virtually no case law on the immunity concept, which experts view as an outgrowth of the notion of executive privilege.

U.S. District Judge John Bates ruled against the George W. Bush administration in July 2008 when it tried to assert blanket immunity to prevent former White House counsel Harriet Miers and then-White House chief of staff Josh Bolten from testifying before Congress under subpoena.

The court ordered them to appear but said they could still make specific executive privilege assertions to evade certain questions.  

“The Executive's current claim of absolute immunity from compelled congressional process for senior presidential aides is without any support in the case law,” Bates, a Bush appointee, wrote in the lengthy opinion.

However, the court issued a stay pending appeal, and the parties eventually settled on an agreement the following year for Miers to testify behind closed doors and the case was dismissed.

“We shouldn’t assume that untested therefore means colorable,” said Steve Vladeck, a University of Texas law professor. “The executive branch has long proceeded on the assumption that there’s room for argument as long as it hasn’t been squarely rejected by the Supreme Court.”  

“There comes a point where that’s not true anymore,” Vladeck said.

Still, both branches of government face a risk of losing and establishing a precedent that could threaten their powers going forward.

Jack Sharman, a former special counsel to Congress during the Whitewater investigation, noted that there have not been many judicial opinions concerning struggles between the legislative and executive branches over congressional oversight requests and that in most cases the two sides resolve the dispute outside of the courtroom.

Sharman also said executive power has generally increased over the last several decades, apart from a handful of what he termed “retreats” of presidential authority.

“The few occasions in … the last 50, 60, 70 years when executive power ended up being weakened was when there were some of the more extreme assertions of it,” Sharman said. “So, for example, President Nixon actually did a lot of damage to executive authority, which then shortly thereafter even beginning with President Carter, certainly started to begin with President Reagan, started to build this stuff up again.”

“Just as I would advise members of Congress to be careful what you wish for, I think the same [advice] goes to the president as well,” Sharman added.

Nadler has launched a sweeping investigation into alleged obstruction and other potential abuses of power by Trump, seeking testimony from key Mueller witnesses including Hicks, McGahn and McGahn’s deputy Annie Donaldson.

The panel will have the opportunity to publicly question Mueller himself on July 17.

The White House has accused Democrats of pursuing a do-over of Mueller’s two-year probe, which did not establish a conspiracy between the Trump campaign and Moscow and did not reach a conclusion on whether Trump obstructed justice.

Democrats are hopeful that a court victory to enforce the McGahn subpoena will help them secure testimony from other witnesses and erode the White House’s efforts to resist the congressional investigation.

A committee aide did not respond when asked about the timing of the lawsuit.

Still, a court fight would be tedious, potentially delaying any testimony from McGahn for several months, even if Congress is ultimately successful. Some Democrats who support opening an impeachment inquiry believe that doing so would help quicken the pace of their court fights.

“The only thing I can say with confidence is it’s not going to be a matter of weeks. It’s going to be months, if not a year or two,” said Vladeck. “At the end of the day, my own view is that Congress has the better of this argument, but that may not matter if it takes 18 months for the courts to definitively say so.”

Jacqueline Thomsen contributed.