The Attempted Assassination of Franklin D. Roosevelt

On the evening of February 15, 1933, President-elect Franklin Roosevelt delivered a short speech to a crowd at Miami’s Bayfront Park. Years earlier, FDR had fallen victim to polio. Because of his resulting disability, Franklin Roosevelt often spoke from the rear seat of an open touring car rather than making the arduous trip to a platform. When he finished his remarks, the crowd surged forward, but was halted abruptly by six pistol shots fired in rapid succession.
http://www.u-s-history.com/pages/h1516.html
https://en.wikipedia.org/wiki/Giuseppe_Zangara