I guess it’s the harbinger of incipient revival of the notorious Chicago Outfit allegedly formerly closely connected with local politicians*. I've seen somwhere that folks prognosticate outbreaks of its activity after a good spell of pacifying hibernation.

Although other urban areas had their share of corruption, Chicago remained unique for its mixture of Organized Crime and political organization. The extent of Mafia influence on the city is still not fully appreciated, even by long-time residents. We think of Mobs hijacking trucks or businesses – not ballot boxes. But the ability to deliver votes and manipulate elected officials provided more muscle to the Outfit than their army of enforcers.
*Newsalert: The Political Corruption Behind Barack Obama and Chicago