At the White House’s Whim
Tom Bingham: The Power of Pardon, 26 March 2009
“... period from January 20, 1969 through August 9, 1974. Nixon himself had controversially pardoned Jimmy Hoffa, the former president of the Teamsters Union, who had been convicted of jury tampering, on condition that he stay out of union politics; and Ford was succeeded by Jimmy Carter, who commuted the 20-year sentence ... ”