Som skarp politisk satire er Duck Soup Marx Brothers' morsomste og mest vanvittige film. Groucho er Rufus T. Firefly, den grinagtige diktator i det opdigtede land Freedonia. Harpo og Chico bliver gjort til spioner af Grouchos politiske rival, den beregnende Trentino (Louis Calhern). Filmen indeholder mange af brødrenes berømte scener: limonadeboden, Paul Revere-parodien, den entusiastiske fremførelse af "We're Going to War", der gør grin med 30'ernes musicals, den rablende spejlscene og det store opgør, som er blevet kopieret af alle fra Woody Allen til Mad Magazine.

The Hollander family's European vacation is interrupted when their plane is forced to land in Vulgaria. The Hollanders leave the plane to take pictures which results in accusations of spying. Chased by Vulgarian soldiers, they take refuge in the American Embassy under the protection of the absent ambassador's hapless son.

Political satire has Shakespeare's Romeo & Juliet story updated for the cold war era, with the children of the US and Russian ambassadors falling in love.