The Pardon Power
Article 2 section 2 clause one could not be more clear, if you are an impeached president, you cannot grant clemency or pardons in any cases, including your own or for your self, that emerge out of the impeachment it is the only exception to the pardon power.
Because Donald Trump was impeached, I do not believe he can pardon himself under the only exception to impeachment. Furthermore there were cases that arose out of his impeachment and I believe that he cannot grant reprieves or pardons in those cases either￼. Note that the language of Article 2 Section 2 Clause 1 says CASES (plural￼), therefore it is not just his (CASE )singular, but any CASES that are the result of his impeachment (ie. Manafort and Stone) these cases are the only exceptions to the pardon power. In fact, he cannot let them out of jail either, clemency.
I think it also implies by definition that a future president, because it is a case of impeachment cannot touch these cases either. I think the founding fathers wanted people who violated the Constitution and were impeached for it by the House of Representatives and who chose to stay in office to live with it especially if they are unrepentant.￼
The notable distinction is Nixon. Nixon QUIT before he was impeached by the House of Representatives and therefore he was available for a pardon from Gerald Ford. Trump did not quit before he was impeached. He decided to hang around with McConnells’ senate and the Senate refused to remove him, but he remains impeached. ￼It also means that President Joe Biden does not have the power to grant a pardon to an impeached president who did not quit before impeachment￼.
Therefore, he can grant clemency and pardons to anyone that he wants to other than himself and his associates whose cases arose out of his impeachment case￼.