FDR And Harry S Truman Elected For Democratic Ticket, Senator Alben Barclay Speaks

Senator Barkley nominates a candidate for the presidency, highlighting their intellectual and moral qualities by comparing them to past U.S. presidents like Jefferson, Jackson, Lincoln, Cleveland, and Wilson. The convention, marked by some delegates walking out, is the first wartime Democratic convention since 1864, emphasizing the tradition of government by consent.

What does the speaker imply about the delegates who walked out?

What traditional American customs are mentioned in the speech?