https://www.vox.com/policy-and-polit...mueller-guilty
To speak the obvious has become nearly forbidden. But here goes: Donald Trump has gone to extraordinary lengths over the course of his time in office to try to stymie or discredit rigorous investigation of the Russia matter.
The most likely explanation for why he has done it is that he is guilty of serious Russia-related wrongdoing.
There are viable alternative hypotheses, like he's a huge moron or he’s guilty of some other serious wrongdoing that he fears an investigation will uncover. But the best bet is that things are exactly as they seem and he’s acting guilty because he is guilty.