ATLANTA — The leader of a private paramilitary group that provided security for Rep. Marjorie Taylor Greene said he has formed alliances with other far-right groups to advocate for Georgia’s secession from the union, following the arrests of participants in the Jan. 6 insurrection at the U.S. Capitol. “The way patriots are now being hunted down and arrested by fellow men and women who have taken the same oath has disheartened any faith I had in the redemption or reformation of the USA as one entity,” Justin Thayer, head of the Georgia III% Martyrs, said in a text exchange with The Atlanta Jour...