---
title: "US Government Definition and Structure | Model Diplomat"
description: "The US Government is the federal system established by the 1787 Constitution, balancing power among legislative, executive, and judicial branches."
url: "https://modeldiplomat.com/learn/glossary/us-government"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- The US Government is the federal system of the United States, established by the 1787 Constitution, dividing power among legislative, executive, and judicial branches.
- Which case established judicial review in the US Government?
- How does the US Constitution divide power between the federal government and the states?
- What is the process for amending the US Constitution under Article V?
- What are the main checks each branch holds over the others?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

The US Government is the federal system of the United States, established by the 1787 Constitution, dividing power among legislative, executive, and judicial branches.

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In 2024, the US Supreme Court in Trump v. United States ruled on presidential immunity, illustrating the judiciary's check on executive power under the constitutional separation of powers.

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