The U.S Constitution cannot be "enforced" on American Citizens. It is enforced upon our government. It's the contract or license granting certain specific powers to government. Anything beyond those limits is usurped or stolen powers.

The military option is something our founding fathers warned us about. A standing army is a bane to Liberty.

I believe that we should form local community militias and form regional militia networks in each state. These militias would train together on a regular basis. They would support each other to protect their communities and citizens from government tyranny, invasions, etc.