No. His efforts to fire Mueller, his efforts to have Sessions direct Mueller not to investigate the president after Sessions recused, and his conduct related to Manafort.
A reasonable inference can be made that Trump’s conduct influenced Manafort’s calculus when determining whether to lie about his interactions with Kilimnik, which just happens to be the most suspicious behavior covered in Volume I.
All of the above instances meet the elements of obstruction, IMO. (The success or failure of an obstructive act does not appear to be an element under the federal statutes. This is based on the analysis performed by Mueller and the discussion of obstruction statutes in, I think, Section A of Volume II. I’ll concede that the reasonableness of this inference is a fair point of disagreement, but IMO, its not material to whether the facts meet the elements of the crime. I mention it only because it does go to the severity of the offense.)
I’m not even considering Comey. I don’t think the authority to fire Comey is a viable defense, I just think there’s too much contradicting evidence of intent, with respect to the Comey firing. I’m not sure it’s even in my second tier of offenses. It might be obstruction, but it’s too much of a close call in light of other, better charges.
The firing of Comey is factually significant because it’s the genesis of the obstruction investigation. Shortly thereafter, Trump became aware that he was being personally investigated, McGahn told him he may have exposure, and that’s when his efforts to assert control over the investigation became more frenetic. IMO, these events are material to a shift in intent.