Like the bloodthirsty hero of Sweeney Todd, the lost souls in this stark musical revue worship a “dark and angry god.” Here, however, in Stephen Sondheim and John Weidman’s meditation on presidential assassins, the murderous urges aren’t played for laughs (usually). Sondheim and Weidman portray the whole rogues’ gallery from Booth to Hinckley, making room for a trio of oddball failed killers from the 70s (Sam Byck, “Squeaky” Fromme, and Sara Jane Moore). This edgy show is especially dark, angry, and satisfying in Chris Maher’s rough, low-budget staging for Open Eye Productions. Though some ensemble members have less-than-perfect voices, everyone captures the crazed spirit of this fever dream of a show. Through 6/18: Thu-Sat 7:30 PM, Sun 3 PM, Storefront Theater, Gallery 37 Center for the Arts, 66 E. Randolph, 312-742-8497, $15.