Illinois Democratic Gov. Pat Quinn is in some hot water with the Jewish community after his campaign tweeted—and then quietly deleted—several messages urging backers to read an article comparing black Republican voters to Jews who collaborated with the Nazis. Chicago Sun Times readers were stunned last week to find that writer Neil Steinberg has penned a column comparing black supporters of Republican gubernatorial candidate Bruce Rauner to Jews who collaborated with the Nazis against their brethren. “As a general rule, individuals will sell out the interests of their groups in return for personal benefit,” Steinberg wrote in his column, which...