(CNN) He warmed the hearts of Bernie Sanders supporters everywhere when he appeared at a Las Vegas rally dressed as the candidate -- with a mop of gray hair, a tie, and black, thick-rimmed glasses.

Now the family of Oliver Jack Carter Lomas-Davis is mourning his death from Sudden Infant Death Syndrome.

"Please come share w/us the short, beautiful life of Oliver who will be greatly missed but not forgotten," his mother, Susan Lomas, posted on Twitter. A wake is scheduled for Monday.

The boy known to the world as the "Bernie baby" will be buried Tuesday.

#berniebaby Please come share w/us the short, beautiful life of Oliver who will be greatly missed but not forgotten pic.twitter.com/P0eGITdwzz — Susan Lomas (@SusieLomas) March 3, 2016

"Oliver Jack Carter Lomas-Davis was an adorable infant who brought smiles to not only his family, but to millions online," his online memorial read . "Oliver's mother, aunt and family are mourning the tragic and surprising loss of this incredible baby boy."

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