If an American paid for an anti-Clinton ad on FACEBOOK...few would think twice about such expenditure because President Trump defeated Clinton largely due to such sentiment.
On the other hand...if the buyer of that ad were Russian...then...however...according to free speech hating Democrats...FACEBOOK should have refused to carry that Russian-bought ad.
Because FACEBOOK is a private enterprise...its handlers can decide what will and won't be permitted. Its their platform and they control it. Congress needs to keep its idiotic self out of the INTERNET and its on-going changes.