at a much lower salary, sure.

> But the unskilled citizen labor that gets pushed aside by unskilled immigration - they have a much harder time finding work.

No they don't, not according to studies. Studies show that immigration increases the number of total jobs available. There are fewer available jobs for janitors, but more available jobs where just being a local is a marketable skill. A local has language and cultural skills that immigrants don't have.

So they're less likely to find work as a janitor but more likely to find one as a waiter or retail manager, both higher paying positions.