Rod Blagojevich's former Chief of Staff, John Harris, reported to jail Tuesday for his involvement in attempting to sell President Obama's vacant U.S. Senate seat.
Harris was convicted in March following a guilty plea. Though he faced up to five years in jail, he was only sentenced to 10 days with two years of supervised release.
"The offense is so serious and so crucial that I cannot impose upon you a sentence that does not involve custody," U.S. District Judge James Zagel said at the time.
Zagel also sentenced Blagojevich to his 14-year prison term.
Harris cooperated with prosecuters and even testified against his former boss. His sentence was part of a plea agreement made in 2010 for conspiracy to commit bribery.
Harris' 10-day sentence will be served at the McHenry County Jail.