They can and do influence internal politics and foreign policy quite heavily, for example Cuban immigrants are a large voting bloc in Florida, a swing state, wh

They can and do influence internal politics and foreign policy quite heavily, for example Cuban immigrants are a large voting bloc in Florida, a swing state, which is a major reason that Democrats don’t just end the embargo on Cuba. Also one of the reasons Israel is so supported by the US is that a lot of Jewish US citizens lobby for it and care about it a lot. It’s a high bar to put capitalism (plus an obsolete concept and handwavy other things) as what immigrants need to overturn to have been considered influential to US culture, since in a lot of cases that is precisely what brings them to the country to begin with, and is like the main thing the US is known for.