 The groups have collaborated at times on events, although collaboration has not always been easy.In perhaps the most infamous incident, Rabbi Michael Lerner was banned from speaking at a February 16, 2003 anti-war rally in San Francisco, less than a month before the U.S. invaded Iraq.It was generally believed that this was done at ANSWER's behest, because Lerner had been critical of what he perceives as ANSWER's anti-Israel politics.