I don't know what history you have been reading, but immigrants in the 19th, 20th, and 21st century associate primarily with the Dems who control the big city political machines. They are the party of free stuff and unions.
Immigration, Political Realignment, and the Demise of Republican Political Prospects
Democrats ~ clustered in Eastern cities, controlling city councils and urban county councils ~ haven't, to my knowledge, let in very many foreigners as even spokespeople.
LOL. Hell, in places like Hartford, CT they are allowing the illegals to vote in municipal elections. Take a look who is running Arlington County. Your knowledge is indeed limited.
I lived in Arlington county for many years ~ it was Democrat when I got here ~ it stayed Democrat ~ it’s still Democrat ~ very little change in that cold hard fact.
Hartford CT is as Democrat now as it ever has been, but you’ll find that back before the 1980s people didn’t even need to go to the polls to vote ~ the Democrats voted for them and even if they were dead people living on Long Island ~ what a bunch eh!