I always find references to 'class' regarding the US interesting. I will not even attempt to say that I understand the UK class 'system', although I think I have a rough idea of how it 'works'. I think it's one of those things where you have to be a native to really get the nuances.
I think 'class', which is pretty much defined here by your bank account so membership can be rather 'fluid', has played less of a part in US politics since the late 19th Century (the age of the 'robber barons'). But I think Scrotus is making many of us re-think how much it's playing now AND wonder perhaps how invisible it's been in our politics all along, at least since the Reagan Era. Certainly we understood that many of our politicians either came from old money or 'got some on their own', but they still seemed to have the traditional core 'American Values' of hard work, family, love of Country, and at least the appearance of 'lifting our lamp beside the open door'. We expected our rich folk to be philanthropic. If they entered politics, we expected them to represent ALL of us, regardless of 'IDPOL'.
Now with Trump & the GOP as it is, we have rich means you're good (and 'raceless' because all that's seen is the 'green'), poor means you're bad (and 'other'). And those of us in-between are having to choose which side we're going to support.