You claimed dershowitz' position that no one knows... is absurd. it seems you have moderated your stance.
2. I see no basis for believing Congress would impeach simply because a President issued a self pardon. Did the republican congress impeach Obama for his ultra vires acts?
Congress would likely only move against a president if he were being prosecuted for a heavy crime. Or they would remove him for office for political b.s. like "collusion". A non crime is not something a self pardon would remedy.
Therefore in most if not all relevant cases the issue would be the underlying crime not the questionably "ultra vires" pardon.
If there were a real crime and the President were to be prosecuted after his time in office, the courts would get to rule on whether the pardon was a valid excuse or defense.
But again, that is unlikely to ever be ruled upon because the President could just resign a day early and most likely negotiate a deal with his V.P.
2. I see no basis for believing Congress would impeach simply because a President issued a self pardon. Did the republican congress impeach Obama for his ultra vires acts?
Congress would likely only move against a president if he were being prosecuted for a heavy crime. Or they would remove him for office for political b.s. like "collusion". A non crime is not something a self pardon would remedy.
Therefore in most if not all relevant cases the issue would be the underlying crime not the questionably "ultra vires" pardon.
If there were a real crime and the President were to be prosecuted after his time in office, the courts would get to rule on whether the pardon was a valid excuse or defense.
But again, that is unlikely to ever be ruled upon because the President could just resign a day early and most likely negotiate a deal with his V.P.
That's precisely the kind of thing I had in mind. Very perceptive.
In a trivial sense, someone like Dershowitz, or you, are correct when you say "no one knows". But only in the trivial sense. Because what you and Dershowitz are falling back on, which we ought not to do, is the assumption that the Congress might behave in a ridiculous manner, not recognize that the President is not above the law, and therefore not impeach and convict the President immediately if he were to attempt to pardon himself..
If you read my exact wording carefully you will see that I am not arguing this as a legal point. I am simple pointing out how we got here, in baby steps, by Presidents taking action when the Congress was hamstrung into inaction, i.e., effectively moribund, even though those Presidents' acted ultra vires.