I'm delighted that Jed Rubenfeld and Philip Zelikow decided to engage further on this matter. (For the original post laying out Prof. Rubenfeld's position, see here; for Prof. Zelikow's position, see here.) First, from Prof. Rubenfeld:
Let me first thank Hoover Senior Fellow Philip Zelikow for this. It's important for everyone to see forceful arguments on both sides of such an important matter. That said, I think Prof. Zelikow overplays his hand—considerably.
To make the issue clear: I've written that most of Trump's tariffs seem to fall squarely within the language of Section 338 of the Tariff Act of 1930 and that they can be upheld under that Section 338 even though the tariff executive orders don't cite it. (It's well established that executive orders can be upheld under statutes they don't cite.) Prof. Zelikow doesn't take issue with any of that.
Rather, Prof. Zelikow claims that Section 338, which remains on the books today at 19 U.S.C. § 1338, was implicitly repealed by subsequent tariff statutes. Or at least that Section 338(d)—a provision I quoted—has been so repealed.
But "repeals by implication," as Justice Scalia once wrote, "are disfavored—'very much disfavored.'" Here's the Supreme Court's 2020 pronouncement on implicit repeals: