Last week, President Obama announced that he would be taking the initiative to craft immigration policy in the absence of congressional action. All of his actions come under the umbrella of enforcement. The president has no power to rewrite immigration law, but as the head of the executive branch, he can prioritize enforcement.
Republicans decried the move as outside his constitutional powers and threatened to sue. Last week, the Texas Attorney General, joined by 16 other states, sued the United States in the southern district of Texas. So what's their gripe about?