A Texas judge explains that the president’s action on immigration is an attempt to create law from scratch. When Texas filed a constitutional challenge to President Obama’s executive action on immigration, his supporters scoffed and ridiculed the suit as lacking any merit. First, they argued, states are not injured by the federal policy. Second, they contended that Congress had already given the president the discretion to halt the deportation of millions. Finally, they predicted that the courts would stay out of this important policy debate. The Justice Department’s brief rebuked the suit, alleging that the claims “are based on rhetoric,...