After a nearly two-year court battle, former Trump White House counsel Don McGahn testified behind closed doors on Friday about his role in the events described in special counsel Robert Mueller’s report.

A U.S. appeals court on Monday, in a victory for the Trump administration, ordered the dismissal of a lawsuit filed by a Democratic-led House of Representatives panel seeking to enforce a subpoena issued to former White House Counsel Donald McGahn.

In a 2-1 decision likely to be appealed, a three-judge panel of U.S. Court of Appeals for the District of Columbia Circuit said the House Judiciary Committee’s lawsuit had to be dismissed because Congress had never passed a law authorizing such litigation.

Senate Judiciary Lindsay Graham (R-S.C.) responded to President Trump's tweet calling for Graham to compel former President Obama to testify before Congress about the Russia investigation, telling Politico: “I don’t think now’s the time for me to do that. I don’t know if that’s even possible.”

What's happening: Trump has tweeted hundreds of times about "Obamagate" — the baseless claim that the Russia investigation was a political hit job ordered by Obama — following the Justice Department's decision to drop its case against former national security adviser Michael Flynn.

The House Judiciary Committee told a federal appeals court Monday that it still wants former White House counsel Don McGahn to testify as it could potentially lead to the introduction of “additional articles of impeachment” against President Donald Trump over his contacts with Ukraine.

The House Judiciary Committee told a federal appeals court on Monday that it is still seeking testimony from former White House counsel Don McGahn because he could provide information that would help the panel decide whether to recommend additional articles of impeachment against President Trump.

The committee submitted a brief to the D.C. Circuit Court of Appeals arguing that its subpoena of McGahn is not moot following the House's vote to approve two articles of impeachment.

If Don McGahn's testimony produces new evidence against President Donald Trump, the panel could consider "whether to recommend new articles of impeachment."

Lawyers for the House Judiciary Committee floated the possibility that the panel could take up additional articles of impeachment against President Donald Trump, according to a document filed in a federal appeals court Monday.

Urging the court to compel former White House counsel Don McGahn to testify, the committee's lawyers said that his testimony could lead to more revelations about the president's behavior.

The House of Representatives could file a second set of articles of impeachment against President Donald Trump if new evidence of obstruction is obtained from former White House counsel Don McGahn, lawyers for the House Judiciary Committee said Monday.

THE ONGOING BATTLE TO compel former White House counsel Don McGahn's testimony has opened a new front on the war over President Donald Trump's impeachment as the articles appear stalled in making their way to the Senate until at least early January.

While we wait for Mitch McConnell and the White House to figure out whether they can get away with beginning and ending President Trump’s impeachment trial in an afternoon, a provocative new question has been raised: Once impeachment is over, presumably with an acquittal in the Senate, could House Democrats impeach Trump for a second time?

Fox News contributor Katie Pavlich responded to House Speaker Nancy Pelosi's decision to withhold the articles of impeachment from the Senate Tuesday, saying it would only be a matter of time before her "game is exposed."