If Bush cannot visit Terri, she should visit him. He should send a secret service detail to take her out of that death house and bring her to a secure hospital in DC.
Laura, wish that it were, the President does not have that power. Congress does, (the subpoena), but does not have law enforcement quickly able to execute congressional orders by force.
No, the real problem here is that the good guys have waited too long to act and have not been creative in their planning. In the battle between the stupid and the evil, the evil will win.