> But remember that 'leftist' is used more often than not as a pejorative and dog-whistle for "radical Marxist" in the US than a descriptive political label outside of leftist circles.

As seen from anywhere else, the US right now has a center-right party, with a handful of timid socdem members (the Democrats) and a far-right (Republicans), along with some other marginal movements.

Right now some people in the US would call Keynes a communist, or "radical Marxist", to use the dog-whistle you mentioned.