Immigration law? I have no idea but it's definitely a possible violation of the Constitution depending on what they are doing. The Constitution clearly makes immigration solely a Federal Issue.
The Biden administration altered Immigration Law by changing the process of releasing illegals into the US AFTER they have been given a court date, the Biden administration is holding children / illegals in kiddie cages /detention centers longer than legally allowed, by assisting the trafficking of children and illegals all over the US without notifying the local and state agencies they are coming, and more...
When the federal govt REFUSES to fulfill its responsibility of enforcing US Immigration laws, when the federal government refuses to protect the sovereignty of the US and when it refuses to protect the lives of US citizens the states not only have the right but also the responsibility to fill the void by protecting their border and protecting their citizens.
Cartels, coyotes, and illegals are illegally crossing, trespassing on US citizens' property, destroying and damaging property, breaking into homes, stealing valuables and weapons, and injuring / murdering US citizens.
Due to Biden's FAILED Immigration policies states are having to step up.