Something that jumped out at me in the Blagojevich proffer:

"Blagojevich questioned whether the president-elect (Obama) could do "something big" in the "private sector" for Blagojevich in exchange for the Senate seat," the proffer says.

Valerie Jarrett, now a President Obama adviser, pulled out of contention for the seat Nov. 12, 2008.

The prosecution filing doesn't say Obama did anything wrong. It does allege Blagojevich was trying to personally benefit from appointing Jarrett to Obama's then vacant seat.