The New York Times reports, "President Trump on Saturday asserted the “complete power to pardon” relatives, aides and possibly even himself in response to investigations into Russia’s meddling in last year’s election, as he came to the defense of Attorney General Jeff Sessions just days after expressing regret about appointing him." This is a clear expression of how Mr Trump sees himself within the Constitution. He is above it and not beholden to it.
Why is this a concern? Does Mr Trump have absolute power, and is he a source of unchecked power? In many ways the current president behaves more like a monarch and not a constitutional one at that. This probably explains his affinity with tyrants who wield power unchecked by Law.
Trump claims his legitimacy from the Constitution and his winning the Electoral College vote authorised by it, to be President. However, as the Trump train progressively careens off the tracks of the Constitution, it departs from it. I believe as he does so, he loses his claim to any legitimacy.
In many ways his actions remind me of King Charles I, who held himself apart from his people and their Parliament. Perhaps the process adopted to charge Charles I, could be amended to charge Mr Trump, after all he wishes to assert a form of sovereignty, whereby he is answerable to no one except himself.