Claim: Rabbi Joachim Prinz, the president of the American Jewish Congress, was one of the founding chairmen for the March on Washington.
Verdict: Correct (95% confidence)
Explanation: According to the U.S. National Park Service, Joachim Prinz was a co-organizer of the March on Washington, confirming his role as a founding chairman (nps.gov). The Martin Luther King, Jr. Research and Education Institute also states that Prinz served as a founding chairman of the 1963 March on Washington and spoke at the event (kinginstitute.stanford.edu). Furthermore, Wikipedia corroborates that Prinz was one of the founding chairmen and represented the Jewish community at the March (en.wikiped...