In 2010, in a case concerning political speech (
Citizens United v Federal Election Commission) the US Supreme Court decided by a large majority of 8-1 that “disclaimer and disclosure requirements are valid” for political communications. Clarence Thomas dissented in this portion of the opinion – he worried
I cannot endorse a view of the First Amendment that subjects citizens of this Nation to death threats, ruined careers, damaged or defaced property, or pre-emptive and threatening warning letters as the price for engaging in “core political speech, the ‘primary object of First Amendment protection.’” [Thomas is quoting from other opinions.]