He has also written that he believes the Mueller probe has gone too far and that Trump's finances should be off limits to the special counsel.
Schumer, in a separate press conference with reporters, warned that attempts by Sessions's successor or Trump to interfere with the investigation would spark a "constitutional crisis". It's a job he knows well given that Whitaker has spent the a year ago as Sessions' chief of staff.
Early indications are that Whitaker has no intention of recusing himself from oversight over the Mueller probe, thereby shifting oversight away from the controversial Deputy Attorney General Rod Rosenstein. That information would be disclosed to Congress at the end of the investigation, the regulations say.
The president can not directly fire the special counsel.
Separately, Justice Department prosecutors in NY secured a guilty plea from Trump's former personal lawyer, Michael Cohen, who said the president directed him to arrange hush money payments before the 2016 election to two women who said they had sex with Trump.
Mueller declined to comment, according to his spokesman, Peter Carr. He added that it had "been a privilege" to work under Sessions.
"I could fire everybody right now, but I don't want to stop it because, politically, I don't like stopping it". Rosenstein was at the center of a recent controversy after it was reported that in the spring of 2017 he raised the idea of Cabinet members invoking the 25th amendment to remove the president and suggested that he should secretly record Trump. For 18 months Rosenstein has allowed Mueller a generous budget and very broad mandate.
Whitaker had served as Sessions' chief of staff.
GBI launches investigation into allegation of attempted election hack
A representative for the Department of Homeland Security confirmed the agency had been notified, but it deferred to Georgia officials for details.
In July 2017, he said during an interview on CNN that he could envision a scenario under which a temporary attorney general doesn't fire Mueller but rather "just reduces his budget to so low that his investigations grinds to nearly a halt".
Trump forced the resignation of Sessions on Wednesday, a day after elections in which his fellow Republicans lost control of the House but increased their majority in the U.S. Senate.
Instead, the congressman said, the fact Sessions "followed the rules and simply was not involved at all in overseeing the Mueller probe was grounds for this rather long-awaited firing, and all of the public berating that went along with it". "There is no mistaking what this means, and what is at stake: this is a constitutionally perilous moment for our country and for the president". "This is a break-the-glass moment", he said. One was approved by the Senate Judiciary Committee in April, making it eligible for a full Senate vote. "A fellow Iowan, who I've known for many years, Matt will work hard and make us proud", he said in a statement. Or by re-assigning them back to their previous jobs in the Federal Bureau of Investigation and the Justice Department or the intelligence community. He was appointed by President Donald Trump on Wednesday. "A permanent replacement will be nominated at a later date".
Live, ongoing coverage as nation takes to street to let Trump know that "nobody is above the law".
Rosenstein no longer will oversee the special counsel investigation.
David Bosel, a retired political scientist, described Trump's attempts to scupper the Mueller investigation as "dictatorial" and accused most Republicans in Congress of helping Trump tilt the USA towards "fascism". Four former Trump campaign officials - including his onetime national security adviser Michael Flynn and campaign chairman Paul Manafort - are among those who have pleaded guilty.
As reason for his recusal, Sessions cited news reports of two undisclosed meetings he had with Sergey Kislyak, then Russia's ambassador to Washington.
The midterm elections saw the Democrats win control of the lower house of Congress for the first time in eight years, meaning that from January onwards Trump will finally face an opposition that has teeth.
By Thursday morning, more than 1,000 people said on a Facebook page for the event that they planned to attend, and more than 3,200 said they were interested.
-With assistance from Steven T. Dennis.