What thoughts of you on the growing speculation in the last few years that Harry Hopkins was actually a Russian spy?

The book “The Sword and the Shield” indicates that a former KGB spy identified Hopkins as “the most important of all Soviet wartime agents in the United States.” While this doesn’t explicitly state that Hopkins was a spy, Hopkins did apparently exhibit very pro-soviet behavior to the point of being anti-US. Example being that Hopkins tipped off the soviet embassy that US officials were listening to private conversations.