I see a person on the street whom I know I know, but I can't remember his name. This would make me a terrible politician.
Most successful politicians have prodigious memories.
They can remember names, when they last met the person, what they talked about and so on. Bill Clinton has long been famed for having such a memory. In September 1996, working a rope line in Longview, Texas, he came across Annette Robinson of Arkansas, who told Clinton that he had spoken at her school when she was a student 20 years before. George Stephanopoulos, Clinton's former chief aide, used to marvel at Clinton's feats of memory not only of important events but of minutiae. It just always blows me away.