That specific scenario is almost entirely covered by temporary work visas. Unskilled immigrants are also cutting wages in restaurants, factories, construction,

That specific scenario is almost entirely covered by temporary work visas. Unskilled immigrants are also cutting wages in restaurants, factories, construction, and all manner of other industries, all over the country. And this has been going on for generations. It's modern day slavery. These people are held in this psuedo-citizenship limbo and are often abused by their employers. If you are wondering why there haven't been any real labor movements in the past 30 years, this is why. Voter replacement is not the only reason for unfettered immigration, importing a large amount of under-educated people also replaces the middle class by driving the value of unskilled labor down. And that's why an unsecured border has bipartisan support by the politicians profiting.