The user on Gab who identifies as Nora Berka resurfaced in August after a yearlong silence on the social media platform, reposting a handful of messages with sharply conservative political themes before writing a stream of original vitriol. The posts mostly denigrated President Joe Biden and other prominent Democrats, sometimes obscenely. They also lamented the use of taxpayer dollars to support Ukraine in its war against invading Russian forces, depicting Ukraine’s president as a caricature straight out of Russian propaganda. The fusion of political concerns was no coincidence. The account was previously linked to the same secretive Russian agency that…