Citizen's United (the case) held that any government restriction on political spending was presumptively illegal and in violation of the first amendment. That

Citizen's United (the case) held that any government restriction on political spending was presumptively illegal and in violation of the first amendment. That is exactly my point. It was NOT a narrow ruling tailored toward the needs of PACs trying to avoid censorship. It was a extremely broad ruling throwing out the whole concept of campaign finance regulation.