Sorry but it was much, much more than that.....
From your link:
Wiki:
The case involved sweeping pay to play and influence
peddling allegations, including the alleged solicitation of personal benefit in exchange for an appointment to the U.S. Senate as a replacement for Barack Obama, who had resigned after being elected U.S. President (see bribery).[10] U.S. Attorney Patrick Fitzgerald noted that there had been no evidence of wrongdoing by Obama.[11]
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Much more?
Eh not really.
I sort of followed it as I live in Chicagoland.
It really boiled down to bribes...offer for money/pay to play. Money did not change hands.