Presuming this is just incompetence instead of malice, when the missing paragraphs are replaced, will "Constitution of the United States Website has replaced missing sections" hit the front page of HN?
This suggests that they were trying to do an overhaul of the contents and made a structural screw-up that caused this. Ironically, these pages are indexed in the search engines still. If you search for "USC Article 1 Section 8 Clause 13" you'll get link to the explainer page [1], and a 404 when you try to navigate to it.
Someone royally screwed up here.
[1] https://constitution.congress.gov/browse/article-1/section-8...
[2] https://www.law.cornell.edu/constitution-conan/article-1/sec... for a working annotated site, though even it is mildly broken.