150 years after their inception, assimilation of ethnic whites has largely ended those political machines. But the effects are cumulative. Chicago still lives with the consequences of the machine politics of the Cermak to Daley era. And ethnic politics still plays a large role in Chicago between whites, hispanics, and black people: https://www.hispanicfederation.org/news/new-poll-shows-dead-... (“One interesting finding is that one-third of Latinos think Vallas may be Latino.”).
It comes off a little bit like it would if you claimed that immigration brings with it organized crime, because La Cosa Nostra was dominated by Italians. But LCN is not in fact the story of Italians in America, and wasn't replicated by other ethnic blocs.
People share affinities and affinities structure interactions, and naturally some of those structural affinities are going to be ethnic. But if they weren't ethnic, they'd be religious, or political, or economic, which is what US history actually demonstrates.
If you're going to make the case that any of this matters in Chicago politics, though: cite the immigrant bloc that controls and distorts Chicago politics. Which ones are the illegitimate aldermen? I don't like most Chicago alderpeople, so you're not going to hurt my feelings.
Whether or not tribalism exists among white ethnics today is besides the point. Corruption is self-perpetuating. The real question is what Chicago would look like today if it had never experienced mass immigration, starting with the Irish. I strongly suspect it would be a better governed city today, like Toronto before the recent mass immigration.
There is a single well-governed city in the world that has experienced mass immigration from multiple ethnic groups, and that’s Singapore. And that’s got an authoritarian, top-down government, and seems to be engaged in selective immigration to maintain a stable ethnic composition and Chinese supermajority.
> But LCN is not in fact the story of Italians in America, and wasn't replicated by other ethnic blocs.
There’s two different things. Mass immigration alone gives rise to ethnic, religious, and cultural conflict, which undermines democracy. Then sometimes you import specific problems from specific places. Organized crime is a bigger problem in Italy even today than in England or Scandinavia. And it was a definitive part of the story of Italians in America. It took decades to eradicate that problem.