Of all the Rod Blagojevich witnesses expected in this trial, no one's cooperation personally hurts the former governor more than Lon Monk.
Monk was Blagojevich's running buddy, his law school roommate, his groomsman.
Monk's parents even attended Blagojevich's wedding.
But today, Monk will be on the stand for the government.
Monk, whose cell phone was among those wiretapped in the Blagojevich corruption probe in 2008, can take prosecutors through numerous alleged corruption schemes beginning when Blagojevich first took office in 2003.
Monk will say he took cash pay offs from political fixer Tony Rezko, among other schemes. Monk also worked as Blagojevich's chief of staff.
In opening statements yesterday, attorney Sam Adam Jr. noted Monk was the California guy with "beautiful hair." He then paused and looked at Blagojevich, rattling off a line that made more jurors laugh than most things Adam said over two hours:
"Maybe not as good as others."