Be careful. What goes around, comes around.
I will grant you that Barr set the tone with his letter and it is now highly doubtful that Trump will be ran out of office before 2020.
But Barr never said that the Muehler Report didn't contain any documented evidence of obstruction of justice. In fact Barr specifically mentioned that there was "evidence on both sides" to avoid having his letter look like a massive fraud. So when the report finally sees the light of day, it will be interesting.
But I've come to believe that Barr may have done the Democrats a favor. The less that the Dems spend on the Muehler Report and the more time they spend on the issues that really matter to the American people, the better their chances are of winning back the WH in 2020.