[ampat]

If the border of the US with Mexico is also a state border, cannot the state defend itself?

[B4Ranch]

Of course it can. However with the way our gov't has been changed where states send all the money to DC for distribution, it's not too hard to control a radical state. If civilians and state gov't decided to make the state border safe then DC would have to do some serious thinking. That could be the first steps of a revolution.