Democratic National Conventions: A look back

The Rev. Billy Graham,center, at the podium of the 1968 Democratic National Convention in Chicago on August 27, 1968. (AP Photo)

Democratic National Conventions: A look back

Delegates demonstrate for President Harry S. Truman around the speaker's rostrum after the President's name was placed in nomination for presidency at the Democratic National Convention in Philadelphia, Pa., July, 14, 1948. A replica of the Liberty Bell is on thespeaker's stand at left. (AP …

Democratic National Conventions: A look back

Delegates, yelling and cheering, hold their state banners high as they pass the speaker's rostrum during a tumultuous demonstration for Senator Alben W. Barkley of Kentucky at the end of his keynote address at the Democratic National Convention in Philadelphia, Pa., July 12, 1948. Sen. Barkl…

Republican National Conventions: A look back

Dewey and Willkie adherents in the New York delegation in Philadelphia an attempt to seize the New York State banner June 26, 1940 at the republican national Convention. The scene followed the nomination of Wendell Willkie for the presidency. (AP Photo)

Republican National Conventions: A look back

Demonstration which followed the placing of Wendell Wilkie in nomination for the Presidency in Philadelphia June 26, 1940 shows the battle which developed as Willkie adherents in the New York delegation tried to take the New York banner into the parade and Dewey friends to keep it out. (AP Photo)