They didn't go as far as Antifa does but the TEA Party certainly was guilty of many of the same things. Lots of threats to bring "Second amendment solutions" to political disagreements. They certainly engaged in dehumanizing their opponents. Seems like whoever is out of power does this and each cycle it gets ratcheted up another notch. It's worrying what the reaction in some quarters might be if someone like Bernie Sanders, who openly calls himself a Democratic Socialist, wins the presidency.