A warning came from a former Oath Keeper who said the U.S. is lucky more blood has not yet been shed. "The best illustration of what the Oath Keepers are happened January 6 when we saw that stacked military formation up the stairs of the capitol. I can tell you that they might not like to call themselves a militia but they are, they are a violent militia," said Jason Van Tatenhove, a former Oath Keeper. Testimony in the January 6 committee hearing showed how extremist groups were mobilized by what election experts call the big lie. Dr. Donell Harvin...