First, the letter oddly claims that, when Trump allegedly asked former FBI director James Comey to end the investigation into former national security adviser Michael Flynn, the president could not been trying to obstruct justice, since he did not know Flynn was under investigation in the first place.
The most sweeping assertion that Dowd and Sekulow make in the memo, according to the Times, is the broad view of Trump's constitutional powers.
Mueller has requested an interview with the president to determine whether he had criminal intent to obstruct the investigation into his associates' possible links to Russia's election interference.
Dowd and Sekulow expressed concern that Trump could be exposed to accusations by investigators of lying or committing a crime or an impeachable offense.More news: With no takers, Air India’s divestment plan nosedives
If Trump does not consent to an interview, Mueller will have to decide whether to forge forward with a historic grand jury subpoena.
"In light of these voluntary offerings, your office clearly lacks the requisite need to personally interview the president", the letter read.
"There was No Collusion with Russian Federation (except by the Democrats)", the president tweeted Saturday.
"Can you believe that with all of the made up, unsourced stories I get from the Fake News Media, together with the $10,000,000 Russian Witch Hunt (there is no Collusion), I now have my best Poll Numbers in a year". So bad for our Country.
Trump tweeted 40 minutes before the New York Times broke the news, questioning whether Mueller's team or the Department of Justice was responsible for leaking the letter. Trump went on to say that authorities should instead be investigating what he called Democrats' corruption.More news: Updated hurricane season forecast calls for fewer storms
On both fronts, they have attacked the credibility of a key witness in the inquiry, the fired Federal Bureau of Investigation director James B. Comey; complained about what they see as investigative failures; and contested the interpretation of significant facts.
However, Congress can do very little to cut funding from Mueller as his budget falls under a special Treasury Department account.
It is unclear which letters the president was referring to.
Whether Trump's lawyers' interpretation of the Constitution is correct is an open to debate.
Trump's lawyers argue that he can shut down an investigation or fire subordinates, regardless of his motivation. "This is a completely tainted investigation".More news: Samsung Galaxy A9 Star & Galaxy A9 Star Lite Smartphones Are Now Official
In the June 23, 2017 letter from Marc Kasowitz, one of Trump's longtime personal attorneys, he makes numerous same points, arguing there was no basis for an obstruction charge and the president, as Comey said, has the power to fire anyone when he so chooses.