Good post and let me add another item from the U.S. Constitution (Article IV., Section. 4.): The United States shall guarantee to every State in this Union a Republican Form of Government, and shall protect each of them against Invasion.
Politicians who aid and abet the current illegal invasion are clearly violating the solemn oath they took to protect and defend the constitution. And Perry is one of many who will do this to get votes.
One day all of these people will pay for their violations of our Constitution... hopefully a bunch of them start their payments in November of 2012!
LLS