I've not seen much in the news about child sex rings in the US

You mean the commie-socialist-libtard controlled MSM? Rachel Madcow, Andy Cooper, NYT, CNN, et al has not released any hard-hitting investigative exposes? Golly gee, wonder why? The Justice Dept (now thoroughly infiltrated by leftards/libturds) seems to think it's no small problem:

https://www.justice.gov/criminal-ceos/child-sex-trafficking

Organizations dealing with this 'little' problem seem not to think it's "Republican disinformation":

https://www.savethechildren.org/us/charity-stories/child-trafficking-myths-vs-facts

https://www.missingkids.org/theissues/trafficking

https://www.childrensrights.org/newsroom/fact-sheets/child-sex-trafficking/

But I'm soooo sure the leftist media (that has been so deadly accurate in their news coverage and assertions over the last 4+ years), knows waaaay better than any of the above sources what is a non-issue.