Why did american leaders make their buildings like those in ancient Greece and Rome?

They're the birth place of Democracy.

Explanation:

Ancient Greece was considered as the first civilizations that introduced the concept of Democracy.

The building in Ancient Greece was designed to accommodate a lot of audiences facing one specific direction where the speaker can present his/her case. The Roman civilization adopted this building and some principles from Greek's democracy.

American leaders in the past used these concept as a replacement for British' monarchy. They found that mimicking the building can be a source of inspiration that remind them about the core foundation of democratic government.

michael joseph jackson was an american singer, songwriter, and dancer. dubbed the "king of pop", he is widely regarded as one of the most significant cultural figures of the 20th century and one of the greatest entertainers of all time.

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the united states has a federal government. the president is the head of the federal government of the united states. however, each state forms its government for administration purposes. the powers of the state governments are exercised within restricted state boundaries. and citizens participate in this government by voting.