FILE - Chicago police officers attempt to disperse demonstrators outside the Conrad Hilton, Democratic Convention headquarters hotel, August 29, 1968. As pro-Palestinian demonstrations escalate on college campuses around the country, critics of President Joe Biden’s handling of the Israel-Hamas war suggest this summer’s Democratic National Convention could be marred by protests and scenes of chaos that undermine his reelection. It raises the specter of a replay of 1968’s Democratic convention in Chicago, where a violent police crackdown created indelible scenes of chaos. (AP Photo/RHS, File)