I mean to cast no aspersions on any holder, past or present, of the high office of President Of The United States [of America], but the acronym Potus, with its echoes of both potation, and doofus, does no favours to any of them.
Mind you, until 1964 Britain's Minister of Defence bore the title First Lord of the Admiralty; and FLOTA conjures up things that are even worse.
Sunday Rest: doofus. This word appeared in the 1960s. It might be an alteration of goofus, which is to do with the word goof, or it might be from the Scots word doof, which means dolt.
Sadly, no one knows from where the word goof came.