Inside the Wisconsin upset that shook the progressive left for a change

By Eric Bradner, Jeff Zeleny, CNN (CNN) — One month after he suspended his campaign, David Crowley’s victory in Wisconsin’s Democratic primary for governor on Tuesday marked an astonishing turn around. When the Milwaukee County executive re-entered the race 10 days after he exited it, democratic socialist state lawmaker Francesca Hong’s momentum seemed near insurmountable.