Question
#1: What is propaganda?
#2: Why would the United States deploy this tactic to gain support for the war?
Answer to question #1: Propaganda is information used to promote or publicize a particular political point of view or cause.
Answer to question #2: The American involvement during World War II (1941–1945) involved a lot of propaganda which was used as a tactic to increase support for the war as well as commitment to an Allied victory.
Explanation: The propagandists implemented hatred for the enemy and support for America's allies. They sold war bonds and also persuaded people to save some of their material and offer it to the military to use for the war. This propaganda used Patriotism advertisement as a central theme throughout the war and huge campaigns were set out to promote efficiency in factories, reduce rumors, sell war bonds, maintain civilian morale, help war production and create victory gardens.
You can infer that Carl James is not a good football player, that they are playing a football game, that Carl James has never scored a touchdown etc
Hoover bore much of the blame in the minds of the American people.