(CNSNews.com) – In a series of indignant tweets on Wednesday morning, President Trump again condemned the “Russia hoax,” the Mueller investigation, and the failure of investigators to give requested information to Congress.

In his most recent tweet, President Trump said he may have to “get involved.”

“A Rigged System – They don’t want to turn over Documents to Congress. What are they afraid of? Why so much redacting? Why such unequal ‘justice?’ At some point I will have no choice but to use the powers granted to the Presidency and get involved!” the president tweeted at mid-morning.”

The president has both pardoning power and the power to fire anyone in the Executive branch.

In two earlier tweets oon Wednesday morning, President Trump reacted to all those open-ended questions Special Counsel Robert Mueller wants to ask him, indicating his reply to Mueller will be “no.”

“‘The questions are an intrusion into the President’s Article 2  powers under the Constitution to fire any Executive Branch Employee,'” Trump tweeted around 9:30 a.m. He was quoting Joe diGenova, a friend and former U.S. Attorney. DiGenova said the president has the “unfettered power” to fire any executive branch employee; and he said it’s “outrageous” for Mueller to inquire “what the President was thinking.”

Also on Wednesday, the president tweeted: “There was no Collusion (it is a Hoax) and there is no Obstruction of Justice (that is a setup & trap). What there is is Negotiations going on with North Korea over Nuclear War, Negotiations going on with China over Trade Deficits, Negotiations on NAFTA, and much more. Witch Hunt!”

The four-dozen-plus questions Mueller wants to ask Trump — leaked to The New York Times by someone outside the president’s legal team — have the president’s allies warning him of a perjury trap.

The questions jotted down by Trump’s lawyers, following their discussion with Mueller’s people last month, include inquiries into the president’s mindset, feelings, and reactions to certain people and events.

Meanwhile, the headline in Wednesday’s Washington Post says “Mueller warned of a possible presidential subpoena in meeting with Trump lawyers.” That meeting took place in March.

President Trump previously has said he wants to speak to Mueller, but some legal experts, including diGenova and Alan Dershowitz, insist it would be a mistake.  Dershowitz has mused that the Mueller investigation apparently has discovered no criminal case involving Trump and Russia, so Mueller is trying to build an obstruction of justice case against the president instead, by asking questions that go to motive and intent.

White House spokeswoman Sarah Huckabee Sanders on Tuesday referred all questions about Mueller’s questions to the president’s personal attorneys, Jay Seulow and Rudy Giuliani.

Trump on Wednesday also tweeted a plug for a new book by Fox News legal analyst Gregg Jarrett. The book, titled “The Russia Hoax — the Illicit Scheme to Clear Hillary Clinton and Frame Donald Trump” is a “MUST READ,” Trump wrote.