Which two ways in the US today practice the ideas of government of ancient Rome?

Two ways in the U.S. that reflect the ideas of ancient Roman government are the concept of representative democracy and the use of a mixed government system. Just as ancient Romans elected representatives to make decisions on their behalf, U.S. citizens vote for elected officials in a representative democracy. Additionally, the U.S. government incorporates elements of democracy, aristocracy, and monarchy, similar to the Roman Republic's mixed government, through the balance of powers between the legislative, executive, and judicial branches.