It started way before Marcy.
The entire Cook County Democratic Party is a criminal enterprise and was founded by criminals: http://www.amazon.com/The-Gambler-King-Clark-Street/dp/0809328933
It’s a short and interesting read. Cook County which is the City of Chicago’s county, has been corrupt for over a century. It’s a culture and it won’t change until Chicago looks like Detroit. Sadly, Chicago has a diversified economy, a major airport hub, a major rail hub, a massive E/W and N/S highway system and a big lake.
It won’t change in a century.
The only hope is that Chicago goes bankrupt and is put under an emergency manager, who takes away the ability of the aldermen to buy gang support. Unfortunately, Chicago dominates state politics as well.