(paraphrasing from elsewhere) Every good business owner LOOOOVES to tell people/governments they can't pay more money if they can blame it on the law/lawyers.
Without that security blanket, the door is open to extracting money from US businesses by foreign governments. The owner can't even give a good reason why they shouldn't be blackmailed.
From a "corrupt president" perspective, this is a bad policy, but somehow, from an "American business owner" perspective, it's even worse.