Mason:
...the President might use his pardoning power to "pardon crimes which were advised by himself" or, before indictment or conviction, "to stop inquiry and prevent detection."Madison:
If the President be connected, in any suspicious manner, with any person, and there be grounds tp believe he will shelter him, the House of Representatives can impeach him; they can remove him if found guilty.Thanks to Krago X by way of Angry Bear.