Not sure about that. Many of them are here to work in agriculture, and construction, etc. Those 2 industries have huge open border lobbyists pushing for millions of workers
There are plenty of temporary ag visas for the west coast labor need. They would start in So Cal and work up north to Washington with the ripening fruit. There was an entire industry transporting and recruiting them on H-2A visas to work legally. The millions coming across the border now are not coming her to work. They are coming to leech off the tax payer.