Does not colluding with Russia make Trump guilty of obstruction of justice? We all know that Putin acted on his own when he used his Vote Flipping Mind Control ray on voters in FL, WI, and the other states that rightfully belonged to St Hillary. Then, because he's got a weird sense of humor, he reversed the polarity and used it in CA to give Hillary a win in the "popular vote"
Does the fact that Comey is a Clinton sock puppet and that there is no evidence of collusion mean that Trump must be guilty -- of something?
It is quite possible for Trump not to have personally colluded with Russia, but still be guilty of obstruction in the exact same way Nixon was guilty of obstruction even though he did not personally break into the Watergate office complex.
If Trump was aware General Flynn violated the law by contacting the Russians during the transition, and then tried to help cover up that crime by stopping Comey from investigating, then it is an open and shut obstruction of justice.
Trump pwned himself.