Illinois Gov. JB Pritzker was confident that this convention won't be a repeat of the disastrous 1968 one. Getty Images Pritzker (D) on Sunday downplayed fears of demonstrations escalating at this ...

The Yippies gather by Chicago's Civic Center to launch their presidential candidate, a pig named Pigasus, on Aug. 23, 1968, ahead of the Democratic National Convention.© Bettmann/Bettmann Archive ...

Journalist Bill Kurtis, who was 28 when he covered the 1968 convention, told CBS News, “It is eerily similar.” “As Democrats gather in Chicago, the spirit of ’68 is a painful memory ...

He would later become Cook County sheriff in the 1970s. Police try to clear Grant Park during the Democratic National Convention in Chicago on Aug. 28, 1968.

The Nation warned readers early on that the 1968 convention would be a debacle. Ad Policy Protesters clash with the National Guard outside the Democratic National Convention on August 28, 1968 ...

The 1968 Democratic National Convention protests in Chicago, Illinois, against the United States’ involvement in the Vietnam War lasted seven days, from August 23 to August 29, 1968.

Chicago has hosted 25 nominating conventions since 1860 − the most of any city − but it is the 1968 Democratic convention that sticks in the memory of many activists.