The explanation is simple, Putin knows an endorsement from him will be poison to most Americans (excepting such trash as MTM and Tucker Carlson) so he "endorses" Biden. He and Cheeto Mussolini have been members of a mutual admiration society going way, way back...
vote for Biden is vote for Putin
Making her very much still in the running as a VP candidate on the Smelvis ticket...
Publicly hates on her parents. Murdered her puppy and goat while a road crew watched.
Basically she's "Even-Dumber-Sarah-Palin".