User blog comment:Nausiated/Alternate Realities, Time Travelers and other Paradoxes that make my nuts sore./@comment-1713281-20101222030125/@comment-1943608-20101222091015

Duckworld is very specifically an alternate version of Earth. You've got similar countries (Howard was able to run for president because he is a native born American, it's just that his USA isn't the 616 one), similarly named geography (Duckhattan in New Stork), similar currencies (Howard tried to pay for something with a Duckworld dollar bill), similar publications (Playduck, Uncanny X-Ducks comics), even duck counterparts to 616 characters (Ducktor Strange), and real world people (Truman Capoultry).