民主党内大佬手上有他的黑材料，上次披露的他当年在莫斯科光膀子喝酒party的事情，算是给他的一个警告

https://www.washingtonpost.com/politics/in-cold-war-travels-bernie-sanders-found-much-to-admire-behind-enemy-lines-now-thats-a-problem-for-his-campaign/2020/02/24/fd02fb50-572a-11ea-8753-73d96000faae_story.html