In part, yes.
I've seen it myself as the son of a roofing contractor who votes Republican because when he was younger and his business was thriving, his bids were undercut by other companies using illegal labor. Now he's in his 80's and driving for DoorDash, because that's the only job he can get and Biden and Co. aren't going to do anything to help his situation if he doesn't find a way to make money.
I'm just one person in America, but there are millions of stories like this. It really can't be denied that while there are many positive effects of immigration, there are also negative effects, and those can become more pronounced when illegal immigration numbers increase as dramatically as they have in the past four years.
With that said, nearly every working class American is struggling on some level, having watched their grocery, utility, and rent costs double and triple over the last four years. They may not even give a shit about immigration, but they do care that they're working 60-80 hours a week (or more) and their pay isn't sufficient to deal with the cost of living.
And Dems wasted months of the campaign telling struggling people to be joyful.