The progressive left is looking to Chicago for inspiration—and a workable model—on how to challenge Hillary Clinton for the national Democratic nomination in 2016. Jesus “Chuy” Garcia, a scrappy, largely unknown politician, has come out of left field to give Rahm Emanuel, a moderate incumbent from the Democratic establishment, a run for his money. Garcia, who until recently was a county commissioner with nearly zero name recognition, ran an unapologetically populist campaign and won enough of the vote in February’s mayoral election to force Emanuel into a runoff on April 7. Garcia’s unexpected success story has become a national rallying cry for liberals who would like to see a candidate challenge Clinton, the former Secretary of State and presumed Democratic nominee, from the left.