Respectfully, I know the US Constitution quite well.
But tell us, exactly when in the last 7½ years has Obama been concerned about governing in compliance with the Constitution?
And of all the times in the last 7½ years that he has violated the US Constitution how many times has the Congress or Supreme Court done anything substantial about it?
The ineffective republican majority house and senate haven't even been able to do simple things like curtail his spending or his unconstitutional immigration policies.
After the “Clinton impeachment/removal” failure, I think there was sort of a “cost/benefit analysis” done and it was decided it was better to wait Zero out. A “chicken shit” approach I know but that's what we have in office now.
And the “Clinton, etc” was a failure, you don't do that and not win. Not in this day & age, this is not 1868!