Suspicious Activity
Out of all the things that the FBI is doing against Frank Sinatra, still, he was not charged with any criminal behavior. His ties with the mobs were not the only thing that the government perceived as a threat. The files that the FBI has against Sinatra were filled with additional accounts about the activities that he does that are suspicious. Most of his files that the FBI was about him and it revolves around the political sympathies that he has.
Systematic Racism And Discrimination
Frank was a spokesperson of the liberal policies and he always condemns the racism and discrimination that is happening around him. It was also mentioned a while ago that he was friends with John F. Kennedy, and his relationship with him was also viewed as suspicious by the FBI. And some even accused Sinatra that he was having his ties with people who are Communist.