All 125 of them?
This is some kind of Netroots-modulated confrontation ploy.
Either Rahm and the boys are trying a little turnout suppression for the Tea Party event, or they're trying to set up a violent confrontation between the NBPP (as their pawn and foil) and the Tea Partiers so the DC police can arrest a bunch of Tea Partiers with CNN cameras rolling.
That would allow CNN's talking heads to bracket and equivocate between the Tea Party and the NBPP as "extremists", and Janet Reno Napolitano could begin to get some traction with her "every Republican is a dangerous racist neo-Nazi" BS.
Kind of a pre-election ZBO, a la Waco, maybe, crossed with a Taliban-style "information operation".
Chicago politics ain't beanbag.