Original caption: Smiling and confident, President Truman acknowledges the cheers of delegates as he mounts the rostrum at Convention Hall to accept the Democratic nomination for the presidency. The president launched another blast at the Republican congress in his acceptance speech, announcing that he will call a special session of congress for July 26th and daring legislators to act on some of the important measures outlined in the GOP platform. July 15, 1948 Philadelphia, Pennsylvania, USA