'doppleganger' is a made up term to explain the current large number of lookalikes in high society and government. Physical attributes are derived from DNA and it's far from unreasonable to suspect connections between individuals who closely resemble each other. Especially those at very powerful and influential positions during crucial periods in history, like now. We are after all, dealing with a Secret Society.

Some autists believe that the Deep State has been involved in a massive secret cloning and eugenics program since Operation Paperclip, when the OSS ( CIA ) brought scores of Nazi's into the clandestine services of the United States. I share this view and have found more than a few high level Nazi's who closely resemble current major players in the US Government.

These two are dead ringers:

Rod Rosenstein

Heinrich Himmler