[robocat]

https://constitution.congress.gov/constitution/amendment-1/

Is a metalaw restricting the laws Congress can set.

Freedom of speech seems to be commonly regarded as having a far wider scope than it actually does. IANAL.

[dlubarov]

From a textualist standpoint you're right, but in practice the Supreme Court has expanded the First Amendment to prohibit government actions (besides just lawmaking) that would deter speech.