"Impeachment is not a single-shot weapon. The constitution does not say it's a one-and-done deal," Paul Begala said.
"I think the American people need to understand that especially Obama judges are very partisan and their opinions are oftentimes, especially here in the district of D.C., are against the Trump administration for really partisan purposes," Whitaker told Fox & Friends.
In an appearance on Fox News, lawyer Alan Dershowitz also said that the subpoena against Don McGahn will have "no substantive impact."
Former Obama Lawyer Neal Katyal and former prosecutor Evan Perez called today's McGahn ruling, stating that anyone subpoenaed must show up to testify regardless of their position, a "complete win for Nancy Pelosi" and a "devastating" loss for President Donald Trump.
Despite the judge's ruling, the case is likely far from over, and the favorable ruling for House Democrats does not mean other current and former officials will ignore the White House's directive and comply with congressional subpoenas.
"I think we ought to be prepared to go all out on this," Congressman John Garamendi said.
President Trump said Obama "had to know" about the FBI "setup" to investigate his campaign and implied the former president may have helped initiate the Russia investigation.
For Democratic members of the House Judiciary Committee, the White House's latest effort to stonewall their oversight power was the straw that broke the camel's back, with several members calling for impeachment proceedings to begin immediately.
The White House cited a legal opinion drafted by the Justice Department that stated the former Trump official was immune from being compelled to testify.
"It seems that individuals in the Justice Department at the highest levels who seem to state the facts and the law as they exist seem to not do well," said former Deputy Assistant Attorney General Elliot Williams.
Omarosa Manigault Newman told MSNBC that she wouldn't be surprised if she were subpoenaed by Congress.
"Trump's is making the long nightmare of Nixon's Watergate seem like a brief idyllic daydream," tweeted John Dean.
The president recently announced that the White House counsel would leave his job this fall.
"This is not in the president's interest. It wasn't in the president's interest," former Governor Chris Christie said Sunday. "It's bad legal advice. Bad lawyering."
"If a review of Mr. Kushner's ethics issues was completed by the White House Counsel, it must be released," Democratic Representative Raja Krishnamoorthi stated.
Report said McGahn tried to stop Jeff Sessions from recusing himself from the Russia investigation.
Will Don McGahn, the White House counsel, save Trump from the Russia probe? Or will he be forced to turn on his boss, as John Dean did to Nixon?