Mulvaney to file separate suit to fight impeachment subpoena

Mick MulvaneyMick MulvaneyTrump says he may lower corporate tax rate to 20 percent if reelected Is Social Security safe from the courts? On The Money: House panel pulls Powell into partisan battles | New York considers hiking taxes on the rich | Treasury: Trump's payroll tax deferral won't hurt Social Security MORE, President TrumpDonald John TrumpBiden holds massive cash advantage over Trump ahead of Election Day Tax records show Trump maintains a Chinese bank account: NYT Trump plays video of Biden, Harris talking about fracking at Pennsylvania rally MORE's acting chief of staff, told a federal judge that he is withdrawing from his effort to join a former White House aide's lawsuit against House Democrats and intends to file his own case in an effort to fight a subpoena as part of the impeachment inquiry.
Mulvaney last week had asked to join the original case, which would have put him in the awkward position of essentially suing his own boss. That suit was filed by Charles Kupperman, a former deputy national security adviser who was essentially asking the court for guidance on whether the president could order current and former White House officials to defy congressional subpoenas.
But House Democrats decided they didn't want to resolve that question in the courts for Kupperman's testimony and ultimately withdrew his subpoena.
In a filing on Monday, they asked the court to block Mulvaney from joining Kupperman's lawsuit, arguing that it was moot and that the Trump aide was facing different circumstances.
Kupperman also opposed Mulvaney's effort, arguing that the two had different aims in taking the subpoenas to the courts.
Mulvaney argued in his proposed lawsuit that the Justice Department's legal advisers under both Democratic and Republican administrations have advised that the president and his close advisers are immune to congressional subpoena.
"In short, there apparently is no controlling judicial authority that definitively undermines the Executive Branch’s consistent bipartisan conclusion that close personal advisors of the President are bound to abide by the President’s assertions of immunity, even in the face of congressional subpoenas for testimony," Mulvaney's lawyers said in their original filing.