Wild in the Streets (1968)

A film made by American International Pictures featuring Shelley Winters, Richard Pryor, and the actor who played Mr. Robinson in the Graduate.

A lead singer of a pop band leads a youth movement that lowers the voting age to 14, elects him president and then puts adults into internment camps where they are made to take LSD.  

The movie while not great and sometimes corny, has some good music and is an interesting period piece.