I would just like to state that most Americans have no idea what the difference between a liberal and leftist is. When you say you're a liberal, they think you're a leftist. When you say you're a leftist, they think you're a leftist. The conflation will always be there, given the history of the US and decades of the usage of the conflation in everyday American language.

Edit Addendum: it doesn't help that liberals/democratic establishment are somewhat more """"""""""left"""""""""" of the conservatives/Republicans, which is why liberals are grouped with the "left" in the US. It also doesn't help that the "left", who would be more accurately known as that grouping of socialists, communists, anarchists, and every other small or large anti-capitalist and or progressive political identity group, just call themselves "the left" or "leftist", playing into the idea that one's politics can be quickly understood by pointing to the linear spectrum of "right" and "left", as if these broad and false dichotomies fit reality to a tee or some shit.

PSL exists belive it or not

You don’t have to have a party for an ideology to exist.