Tuesday night, Barack Obama holds what he hopes will be his victory celebration in his adopted hometown’s Grant Park. The Associated Press explains: “Grant Park is the place Chicagoans have long gathered to party, protest, and pray,” noting visits by Franklin Roosevelt, the Queen of England, and Pope John Paul II. If the park is a natural place for a party celebrating Chicago’s favorite son, it’s also an unwelcome reminder of two of the Windy City’s black sheep, who nearly derailed his presidential ambitions. Should Bill Ayers and Bernardine Dohrn, by now the most infamous Chicago Friends of Obama, attend...