FDR points out the irony in Republicans trying to blame him for the Great Depression using the propaganda technique -
whereby if you repeat a lie enough times, people start to believe it is true. Today's parallel might be "Weapons of Mass
Destruction," "Mushroom Cloud," "Obama not being a citizen," or "Obama being a Muslim."
FDR's own form of propaganda, his incredible humor, was never more on display than this two minute reference to his dog
that will be remembered for years to come because of the ridiculous nature of the attack made against him (and his dog, Fala).