Friday at noon, as other Loop workers took lunch breaks in the warm, rare mid-February sun, a criminal-defense attorney rallied a crowd of more than 150 in Federal Plaza, across from the Dirksen Federal Courthouse.“Whose court is this?” Molly E. Armour asked into a megaphone.“Our court!” the crowd chanted.Chicago was one of 17 cities across the nation where the National Lawyers Guild organized hourlong rallies near courthouses. These rallies were in support of the General Strike, a move to protest …