Mark Levin’s a good lawyer and he’s figured it out.
My advice to everybody, on important issues, is "trust but verify." Levin has plenty of company. Katyal, Clement, Amar, Balkin, and a host of others.
That doesn't mean they are right.
I'm competent on the law too. One Supreme Court precedent, Rogers v. Bellei, cuts against the experts. Thousands of court decisions follow the same rule, lest you interpret the remark that "one SCOTUS case says such and so" represents some outlier, flier, or quirk of the law. One precedent is all it takes to make a monkey out of Levin.
I looked up the source law because I'm curious. Fewer than 1 in a thousand would do that, so false conclusions generally pass as "truth" in the mind of the listeners.