Three days after the 2020 election, while the result was still in doubt, a chemist from Belgrade was getting emotional. "Even after his video helped inspire the Oath Keepers' illegal actions on January 6, social media posts from Savic and his wife are full of violent and anti-Semitic rhetoric and conspiracy theories about Covid-19 and the January 6 insurrection," says Stephen Piggott, an analyst with Western States Center, a non-profit that tracks extremist groups. "It's unclear what type of visas the couple have, but Mr Savic recently tweeted about his long wait to obtain a US work permit