Article II of the Constitution states “… he (the President) shall have Power to grant Reprieves and Pardons for offenses against the United States, except in Cases of Impeachment.” By our Constitution a person is presumed innocent until convicted, thus an action doesn’t become an offense until it has been adjudicated in a court; consequently a President can only issue pardons for offenses a person has been convicted of or pled guilty to. A blanket pardon, such as the one Biden declared for his son, is unconstitutional and needs to be challenged by Congress. If it isn’t challenged, it will set a dangerous precedent (not that precedents should ever be used to subvert the plain language of the Constitution). What would prevent Biden from pardoning all the persons who illegally crossed our border? It should appear obvious to any rational person that blanket pardons were never the intent of the writers of our Constitution.