It is true that in subsequent New Deal cases, the court vastly expanded Congress’s power to regulate “interstate commerce,” although it has never done what the administration asks it to do now, namely authorize Congress to force individuals to engage in commerce. Obama seems to have been trying to make the accurate observation that since the ’30s the court has not struck down a federal law that applies to economic activity on the ground that it exceeds Congress’s Commerce Clause authority.
But in citing Lochner, the president showed himself to be in over his head.
The full name of the case, Lochner v. New York, should be a sufficient tip-off. In Lochner the court invalidated a state labor regulation on the ground that it violated the “liberty of contract,” which the court held was an aspect of liberty protected by the 14th Amendment’s Due Process Clause. (The legal doctrine at issue, “substantive due process,” refers to the meaning of “life, liberty and property” under the Due Process Clause.)
Lochner, which was effectively reversed in a series of post-New Deal decisions, did not involve a federal law–contrary to the president’s claim–and thus had nothing to do with the Commerce Clause, which concerns only the powers of Congress.
It’s appalling that any president would have the effrontery to lecture the Supreme Court about a pending case. It’s astounding that this president, who was once a professor of constitutional law at an elite university, would do so in such an ignorant fashion.