The Preamble states that one of the purposes of the Constitution is "to provide for the common defence". Article 1, Section 8 specifies that Congress shall hav

The Preamble states that one of the purposes of the Constitution is "to provide for the common defence". Article 1, Section 8 specifies that Congress shall have power to: punish piracy, declare war, raise and support armies, provide and maintain a navy, provide for calling forth the militia to repel invasions. Article 2, Section 2 specifies that the President shall be Commander in Chief of the Army and Navy of the United States, and of the Militia of the several States. Defending the nation against foreign threats is integral to national security and definitely part of the US Constitution.