Whitaker was hired as a CNN legal commentator a year ago for several months, before leaving the role in September 2017 to head to the Justice Department as chief of staff to now-former Attorney General Jeff Sessions.
People in North Alabama will join others nationwide on Thursday to protest former Attorney General Jeff Sessions' forced resignation.
Newly emboldened Democrats have said any attempt to terminate Mr Mueller's investigation would amount to a constitutional crisis.
If Sessions' departure was an "opening move" by Trump to meddle in Mueller's investigation, Hoyer said in a statement, "the president must be held accountable".
Here is a look at how Whitaker might stop or slow the Mueller investigation and the risks he might run in doing so.
Clovis was also listed an unnamed "campaign supervisor" in the indictment of former Trump campaign aide George Papadopoulos, according to The Washington Post.
Congressional Democrats, concerned about protecting Mueller, called on Whitaker to recuse himself from overseeing the investigation in its final but potentially explosive stages.
With Whitaker as Attorney General, protesters are anxious he serves the best interest of President Trump instead of the entire country.
An ever-more exasperated Trump ordered him to give up the mic and Acosta refused, with Trump branding him an "enemy of the people" and a "rude, bad person".
The Justice Department has declined to answer whether ethics officials have been asked to review if Whitaker should recuse himself from the Mueller probe.
Plans are for a protest to be held at 5 p.m.in front of the USA consulate at 1075 West Pender St.
Trump originally said he fired Comey on the recommendation of Sessions and Rosenstein for mishandling the inquiry into Clinton's use of private email when she was secretary of state, although the president later acknowledged he acted because of Comey's pursuit of "this Russian Federation thing".
Trump saw the move as a betrayal and frequently and publicly criticised Sessions for making the decision to recuse himself.
Sessions, who likely suspected his ouster was imminent, was spotted by reporters giving some of his grandchildren a tour of the White House over the weekend.
Lamar Alexander, Republican senator from Tennessee, issued perhaps the stormiest warning, saying the Senate would not confirm an attorney general who sought to stop the Russian Federation probe.
Last November, Whitaker penned a CNN op-ed claiming that the Robert Mueller investigation was going too far by digging into the president's financial records. Trump has not interfered with it yet, despite repeatedly labelling it a "hoax" and a "witch-hunt". Just recently, he told an interviewer that Sessions "never had control" of the justice department. But Mr Sessions's replacement will have the power to do so, or end the inquiry.
Donald Trump emerged from midterm elections promising cooperation only to plunge Washington into turmoil on Thursday (Nov 8) over suspicions that he's trying to kill the Russian Federation collusion probe and an extraordinary intensification of his war with journalists.