Nice little comedy for its time. But you have to understand how things have changed on the making of a Presidential candidate..
Virtually no primaries at that time, so candidates really were selected by backroom shenanigans.
Presidents still only served 2 terms and FDR hadn't shocked people (yet) by going for a 3rd term.
Even today, a Supreme Court Justice with a lifetime appointment and no need to compromise with people he disagreed with would never step down just to be President for a term or two.
Even back then, women were running for some offices and winning.
But otherwise a nice comedy about how people imagined things actually did happen in Washington back then.