My concept of "obstruction" is a lot more unambiguous that what most people on the Left are embracing. It doesn't include Constitutionally protected speech / conduct. It doesn't include privileged speech / conduct. For example, protesting your innocence and refusing to assist a prosecution categorically cannot constitute obstruction, regardless of intent. Similarly, firing a subordinate employee who you are always entitled to fire cannot constitute obstruction, regardless of intent. If you are objectively entitled to act in a particular way, it cannot constitute obstruction. If it turns out that an investigation is not validly predicated or is otherwise without merit, it's really hard to distinguish any allegedly "obstructive" behavior as protesting one's innocence.
What would obstruction look like? Well, it could involve intentionally concealing or destroying material evidence after a validly predicated investigation is opened, in order to hinder that investigation.
