Lets suppose you're absolutely right, what are you going to do about it?

Enact price controls? Maybe that will work, maybe it won't. If the products are made overseas and they can get a better price elsewhere, they won't send them to the US at all.

Investigate the companies? They'll move their headquarters out of the US, they're already not making anything in the states, moving headquarters is basically a formality.

There's a lot of things you can do to "send a message", but nothing you can do will actually make diapers cheaper.... UNLESS you slash regulation and encourage more startups to enter the diaper business and compete.

But if you do that, then you have to walk back on your entire political career.