FILE - Police reroute demonstrators as they try to clear Grant Park during the Democratic National Convention in Chicago on Aug. 28, 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 2024 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 , where a violent police crackdown created indelible scenes of chaos. (AP Photo)