The George W. Bush administration tried to include regulated industries in their regulatory process. In some cases that worked pretty well and was wonderfully reasonable, in others it was a disaster. The CAN SPAM act of 2003 was an example of the latter. Essentially, the Direct Marketing Association got to write their own rules and decide on enforcement, and the Bush administration in it's completely mysterious way decided that enforcement of almost all FCC-related issues would go to the back burner. Why? No one knows, but apart from really cranking up junk fax enforcement in the mid-2000s (yeah, about 10 years too late), the FCC just didn't do anything. And the crooks of course noticed that the Obama administration wouldn't really go after anyone without a social agenda, so they cranked it up over the last 8 years. It would be nice to pursue this at the state level, but, oops, the CAN SPAM act deliberately makes almost all of that a Federal issue on purpose because the Direct Marketing Association has great lobbyists at the Federal level.
So, the first step would be gutting or removing the CAN SPAM act and looking at enforceable rules, opt-in as opposed to opt-out, and then trapping and prosecuting these people. I am sure that there would be lots of knock on effects from it -- do you think that these people don't have other criminal associates in the US? Of course they do. And if the CAN SPAM act is gone then the states can get back to their own enforcement, some of which would be much more aggressive -- something that the Direct Marketing people noticed gearing up in some states at the end of the 1990s (California being on the forefront of the anti-junk-fax legislation and about to extend it to SPAM) and stopped this progress by taking the ability to enforce away from the states for the most part by making it a Federal issue.
To a huge degree, this problem about regulatory capture and secondarily about enforcement.
Yes, Trump would hit the ball out of the park if he went after this.