Hi folks - I've long been a fan of folk music, listened to a lot of Phil Ochs etc, though I'm not a English native speaker. Folk veteran Tom Paxton's songs are always simple and plain, easy to comprehend, but there are several songs I never got to understand.

Two of those are "Mr. Blue" (lyrics) and "All Night Long" (lyrics), both from 1968. I know that those two songs are both about politics, but really have no idea how and why they are about politics. A very similar one is John Prine's latest song, just out last week, "Caravan of Fools" (lyrics), which he said "accidentally" alluded to Donald Trump - but I really can't understand how the song has anything to do with him. (I'd thought that the song is about gambling if I didn't know it's about politics...)

Could anyone shed a light on this? Thank you very much.