U.S. Constitution, Article I — The Legislative Branch, Section 8, Clause 15
To provide for calling forth the Militia to execute the Laws of the Union, suppress Insurrections and repel Invasions;
Notes
Allows Congress to provide for calling forth the militia for three purposes: to execute the laws of the Union, to suppress insurrections, and to repel invasions. The clause limits the listed grounds for calling out the militia to those three situations and places the power with Congress.
Use as reference
Lexinter.net | U.S. Const. art. I, § 8, cl. 15 | https://laws.lexinter.net/constitution/us/article-1/section-8/clause-15