आफै बोक्सी आफै धामी | You can not pardon yourself that is against Democracy, the only power to pardon President is Senate majority with 60 votes.  Never Tried but it was not introduced for Self-Pardoning otherwise president will be autocrat and minimize the rule of segregation of  power and check & Balance.

(Newser) – Sean Hannity is making his advice to President Trump loud and clear: Pardon yourself. "The president out the door needs to pardon his whole family and himself," Hannity said on his radio show. "I assume that the power of the pardon is absolute, and that he should be able to pardon anybody that he wants to."