This is factually incorrect.
They are not popular with anyone in "the States".
For Republicans, dominated (whether they like it or not) by Trump, they embody left-wing wokery, anti-nationalism, inclusivity and what they think is diversity. They're actively disliked in red states, and the feeling is certainly mutual.
For Democrats, they're a joke. They're not serious players, they're not clever enough, they're not thick-skinned enough, they lack startegy, the diplomatic problems are too difficult - they're just irrelevant other than being a distraction if anything (they're not even that).
Talk of any serious political forays is seriously overstated. Neither of them has even a fraction of what it takes.
I do agree that they're probably more popular here than in the UK, and that's only because they're not AT ALL popular in the UK (au contraire). So, a low bar.
An accurate assessment would be "irrelevant" to "annoyingly inserting themselves in weird places" and "mildly entertaining for their transparent grifting".