And just to correct some errors:
The d’s DOJ favorites, Mueller and Rosenstein, could not make cases for collusion or obstruction even with a staff of dem donors and Hillary supporters.
Putting aside the Trumpist Propaganda, two points of fact:
1) Mueller was crystal clear that he was not looking for "collusion" but trying to prove a criminal level of cooperation, which is different. Mueller did, in fact, uncover lots of collusion.
2) Mueller made a case for obstruction. A very convincing one. But he did not believe it is the place of a criminal inquiry to to make that call of a sitting President. He left it to Congress to make that call (not Barr) and those of us who care more about our Democracy than tax cuts are hoping that they will take that case up, whatever the (dubious) arguments about the politics.