The President’s power to pardon is broad, unchallengeable, and almost unlimited. Here are 25 of the most controversial pardons and commutations in history.

 The President’s power to pardon is broad, unchallengeable, and almost unlimited. Here are 25 of the most controversial pardons and commutations in history.

Some pardons have been particularly controversial, including one by former President George W. Bush that he took back the next day.

Former Presidents Richard Nixon and Gerald Ford in 1974.David Hume Kennerly/Getty Images