At the 1968 Democratic National Convention in Chicago , Mixner was beaten by police during the protests held outside the convention center . After Humphrey claimed the nomination , Mixner began seeking out new outlets for his activism . He soon befriended Doris Kearns Goodwin , who introduced Mixner to Senator Ted Kennedy , who would become a lifelong friend
1968 Democratic National Convention
1968 Democratic National Convention
David Mixner