They are both democracies. The United States is based off of ancient Rome. The United States however simplified lots of complicated things from the Roman government.
The main reason why the United States largely shied away from imperialism prior to 1890 was because there was plenty of potential raw materials and resources located in North America, so the US had no real reason to begin searching in other places like Africa.
Answer: The judicial branch's checks on the President and Congress lie in its power of judicial review. As advocated by Alexander Hamilton in the Federalist Papers, the Supreme Court's status as the final arbiter of the Constitution implies its ability to nullify the laws or actions of the other branches. The judicial branch can check the executive branch by declaring presidential acts unconstitutional and can check the legislative branch by declaring laws unconstitutional. Chart with examples of powers that each branch has to check the other two branches.
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