Mostly business owners that hire cheap labor that illegal aliens provide. There are Dems that do this too. It drives down wages by flooding the labor market. It affects minorities most of all.
I think you may find it helpful to rethink your assumption that wages are driven down by illegal immigrants who are flooding the labor markets. Right now, in Florida at least, labor is scarce, but illegal immigration is said to be a big problem. Your characterization of the problem is over-simplistic and factually inaccurate.
Wages are not being driven down by a flood of illegal immigrants. While illegal immigration continues, wages are rising fast.
This is partly because of the minimum wage increase that A STRONG MAJORITY OF THE PEOPLE (including a ton of Trump voters in this red state) voted into law in the form of a state constitutional amendment. It's partly due to the current shortage of workers that now exists. And it's partly due to inflation.
Things cost more so the scarce number of workers workers are demanding more, and they're getting it. And they are also getting it because the law requires employers to raise pay if minimum wage is being paid.
The minimum wage hike is having a knock-on effect on other wages too. Employers (including our city which employs hundreds of workers) who used to pay $15 per hour are raising pay to $17 or $18 because minimum wage will be $15 and they don't want to lose employees who will leave because they don't want to work for "minimum wage." Their self-worth and self-esteem will prompt them to leave a job where they made more than minimum wage before but make minimum wage now. Why work for the city for $15 when Target and Walmart pays more and offers the same or better benefits?
I don't know the illegal immigration stats for Florida, but I do not think the inflow of illegal workers has slowed in recent times. Note that the number of arrests at the border and the number of successful crossings are not the same number. Just because more people have been arrested at the border, it does not follow that fewer people are illegally getting in.
The assumed correlation you make between the number of illegal workers present and the direction of wages is simply wrong. The truth is, illegal immigration is persistent if not increasing. AND wages are increasing.
And it's really hard to find workers now. The labor markets are anything but flooded. Before COVID-19, I could run a help-wanted ad for a gym manager and receive dozens of applications. I could fill the position quickly. The last time I ran the same ad, I had just three qualified applicants over two months, and we lost two of those to other jobs before our interview process was complete. The position was eventually filled but the change in the labor market is dramatic.
And, according to some of my Chamber of Commerce friends and the city managers I know, I'm one of the luck ones in that I was able to fill our vacant seat. Numerous employers have vacancies they cannot fill.