Texas Governor Perry has the authority to call forth the state military forces and the reserve militia to repel the invasion.
Tex. Gov. Code Sec. 431.071
http://www.statutes.legis.state.tx.us/Docs/GV/htm/GV.431.htm#431.071
Tex. Gov. Code Sec. 431.001
http://www.statutes.legis.state.tx.us/Docs/GV/htm/GV.431.htm#431.001
Tex. Const. art. 4, § 7
http://www.statutes.legis.state.tx.us/Docs/CN/htm/CN.4.htm#4.7
U.S. Const. art. IV, § 4 mandates the Federal government protect states against Invasion
The Federal government has not performed.
States have legal recourse.
The law supports the states.
The federal government is violating law.
You don’t have to tell me, darlin’. I been yellin’ the same thang in his ear for way too long.