Answer: the United States government is based on democracy and democracy was born in Greece. Athenian democracy developed around the sixth century BC in the Greek city-state (known as a polis) of Athens, comprising the city of Athens and the surrounding territory of Attica. Rome copied democracy from Athens. The major difference is that the Greek democracy gave more power to more people than the Romans did. After many years democracy experience change and then it was a great attempt to reduce the power of the king. the Domesday Book arose and it is a manuscript record of the "Great Survey" of much of England and parts of Wales completed in 1086 by order of King William the Conqueror. After that, Magna Carta Libertatum (Medieval Latin for "the Great Charter of the Liberties"), was an attempt again to curtail the king's prerogatives commonly called Magna Carta is a charter of rights agreed to by King John of England at Runnymede, near Windsor, on 15 June 1215. As you can see the United States government is based on many experiences and the main difference is that in America common people can exercise the right to vote but in the other experiences few groups could actually vote and fraud was also present like in Rome where patricians bought the elections many times. In Athens only twelve percent of Athens's populace was allowed to vote.
Democracy has different challenges in America like empowering women and minorities as well as applying federal principles to ensure autonomous decision-making and decentralisation. In other words, deepening democracy.
