In the United States, the President decides who to pardon in certain ways.
One of which is through his own will or accord.
Another means is through the applications for pardon made by the convicted person. This application is then sent for review and non-binding recommendation by the Office of the Pardon Attorney, who is an official of the United States Department of Justice.
The Presidential pardon is only applicable to convictions under federal laws, but not state or officials that were impeached.
