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The Constitution.

Read the words. See the structure. Understand what connects them.

Preamble · Seven Articles
Twenty-seven Amendments

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Constitutional text

Article IV · Section 4

3 selectable clauses · PDF page 9

The United States shall guarantee to every State in this Union a Republican Form of Government, and shall protect each of them against Invasion; and on Application of the Legislature, or of the Executive (when the Legislature cannot be convened) against domestic Violence.

Source: the uploaded National Constitution Center edition. Historical wording and its bracket markers remain visible; later amendments and the reading notes explain changes.

Clause notes