An Aussie plot

Bernie Sanders Fined For Illegally Coordinating With Australian Labor Party

Perhaps involving these folks:

The Australian Secret Intelligence Service is Australia's foreign intelligence agency. ASIS was formed in 1952, but its existence remained secret even within the Government until 1972. 

Hmm... To what end? Sanders, the Aussie Manchurian candidate?  This could be war, the Marines should grab their surf boards.