Democrats go mad every time Trump moves to stop corruption in the government. Sessions allowed the partisan Trump-haters to craft a fake investigation into non-existent Trump/Russian collusion and now it is left up to Trump to stop these partisan morons from continuing their abuse of offices of the US Government.
When did Trump move to stop corruption in government? His cabinet is the definition of the swamp -- filled with self-dealing abusers of their office -- from those who trade in stocks that benefit from their decisions as govt officials, to those who use government resources as their personal piggy bank. Trump himself is a profiteer.
One also has to take a full dose injection of denial to conclude that Trump/Russian collusion is fake. For someone who claims innocence, he's acting suspiciously guilty when he tries at every turn to place stumbling blocks before the investigation and lies about continuously.
Trump's own lawyer contradicted Trump's claim that he had no knowledge of the Trump Tower meeting with a Russian operative. In fact, Trump himself -- who originally said "nobody met with Russians" -- which then turned into "yes, they met with Russians but only about adoption -- and I wrote the letter myself" which then turned into "they met with Russians about *opposition research* which everybody does" and then, "collusion isn't a crime." No, that is admitting that his son conspired with a foreign government to illegally affect an election and he knew about it -- which means he lied about it previously too.
During the campaign, Trump establish back channels to the Russians that only use the Russians' own secure communications, and cannot be heard by American intelligence. What American president has a secret two-hour meeting with Putin and won't disclose what was discussed?
What American President asserts that he has the absolute right to pardon himself while also asserting that the did nothing wrong?
If your standards are: "collusion hasn't yet been proven beyond a shadow of a doubt in a courtroom," you can't also be saying "Mueller needs to hurry up and shut down his investigation." If you actually care about the country, you wouldn't say "the president can't be charged with obstruction of justice by definition," you would ask: "What did the President and his family actually DO?"
If your standards are: "We care about our country and its independence from *any* foreign power," you ought to be profoundly concerned and want the most comprehensive investigation possible -- not shut it down.
