DETROIT, - General Motors Co's Cadillac brand on Saturday disavowed a casting notice that called for an 'alt-right (neo nazi)' role in a Cadillac commercial amid a storm of outrage on social media. The casting notice, circulated on Twitter and Facebook, said an agency was looking for 'any and all real alt-right thinkers/believers' and indicated the call was for a Cadillac advertisement to be filmed later this month. The alt-right is a loose grouping characterized by a rejection of mainstream politics that includes neo-Nazis, white supremacists and anti-Semites. The alt-right came to the fore during the US presidential election. Cadillac officials said on Saturday the brand 'did not authorize or approve a casting notice for an 'alt-right (neo-nazi)' role in a commercial. We unequivocally condemn the notice and are seeking immediate answers from our creative agency, production company and any casting companies involved.'