Since the Republicans currently control both houses of Congress and is likely to appoint one of their goons to the Supreme Court, this is an unlikely scenario for the immediate future. However much the mainstream Republicans hate Donald Trump, he is still technically a Republican and better than a stick-in-the-eye for their right wing, America-hating causes.
There is the entertaining possibility, however low probability, that the Republicans might impeach Trump if he did something egregious, as a way of putting a more compliant reactionary in charge, e.g. Pence.
This scenario also requires, or may require, such things as an internal security unit doing the right thing and trying to enforce the law, or a whistle blower who is aware of the crime coming forward, or a responsible press, and usually a combination of the above.
This is a likely scenario ultimately for Trump. But there are many reasons to think that it also might not work in his case. Trump has proven to be remarkably immune to borderline insane behavior already exhibited, the Republicans control both houses of Congress and would have to approve an independent prosecutor, and our internal security forces would have to do the right thing which in general is not a realistic expectation on our part.
In the next post on the subject of removal, we will review some of the more entertaining but illegal methods of removal of the chief executive such as assassination.