For federal offenses, the President's clemency power is close to absolute: pardons erase convictions, commutations shorten sentences, and neither Congress nor the courts can undo them. It is the presidency's most personal power, exercised with no vote and no veto.
Read the clause itself, verbatim and in plain language, in the in-app Constitution.
The President, alone
Clemency covers 'Offences against the United States', federal crimes only, not state crimes or civil liability, and cannot touch impeachment. Pardons can issue before charges are filed (Ex parte Garland; the Nixon pardon), and can be broad. A Justice Department pardon attorney processes routine applications, but the process is advisory: the power belongs to the President personally.
