The statement that “Bernie has been a Russian asset for four decades. USSR, Communist Cuba, Sandinistas, and the East German Stasi. He has despised the Dems ever since JFK tried to take our Bernie's hero, a brutal Communist dictator named Fidel Castro.” made by @raventerp1.bsky.social is unsupported by evidence. First of all, most of the evidence they presented does not show the original source, one of which does not support the claim that Sanders is a Russian asset and does not even directly state who the quote is about, only using the term the defendant. Another piece of evidence, while having a source, only shows that most Sanders supporters voted for Hillary Clinton in the 2016 election. The only piece of evidence that is even remotely related to the claim is a list of Sanders quotes that go against the democratic party, but that in no way proves that he is a Russian asset.
Second of all, when looking for other sources surrounding this claim, I found an article from “The Nation” which stated that this rumor began when Sanders voted against legislation to put sanctions on Russia and Iran. He was one of two to vote against it, reason being that he feared it may jeopardize the 2015 nuclear deal. Though twitter then began to spread misinformation that he was a Russian agent with no evidence to back the claim. Therefore, this claim is false.
Sources: Bernie Sanders Is a Russian Agent, and Other Things I Learned This Week | The Nation