Probably most politicians are as ignorant as Biden and look good only if they have a capable staff. I am reminded of Senator Montoya in the Sam Ervin Watergate hearings in 1973--he read questions prepared by his staff and would read the next question without realizing the witness had already answered that in replying to an earlier question.
I like to say that if one doesn’t know a thing, it makes them ignorant regarding that thing. And it is nothing to be ashamed of. I can not tell you the different names of the various kinds of clouds. That makes me ignorant of that. But a Meteorologist that is ignorant of that is also what I call STUPID. If you don’t know something that you SHOULD know, you are stupid.
A politician that doesn’t know that FDR was not president in ‘29 and people didn’t have televisions in the US at that time, well, that’s stupidity.