Shortly after Halloween, I had this idea for Vivek Ramaswamy to cosplay for the occasion as Braniac 5. He has a reputation for being a young but super smart guy, a Braniac if you will. It would be a fun costume, that would get him clicks and media attention, while also reinforcing his genius/Braniac image. And maybe as a man of the future.
From the Supergirl TV series, this one comes the closest to how I think Vivek would look.