PHOENIX β€” A Republican state senator has introduced legislation dealing with illegal immigrants that could conflict with a U.S. Supreme Court ruling that Arizona has no right to enforce federal immigration laws.

That could lead to the same kind of multi-year litigation that eventually voided key provisions of a 2010 Arizona law known as SB 1070.

The new Senate Bill 1231 would make it a state crime for anyone to enter the United States from any foreign nation other than at a port of entry. It would authorize local or state police to enforce the law.

The proposal by Sen. Janae Shamp of Goodyear also seeks to let police arrest anyone who is not a U.S. citizen who has been denied admission or already been ordered deported.

A third provision also would allow the arrest of anyone who already was ordered to leave because they had been convicted of either of the prior offenses and had been ordered to leave but refused to do so.

That one is a felony that would carry a presumptive sentence of five years in state prison, unlike the other offenses, which would be misdemeanors or which a judge could dismiss if the person agreed to leave.

State lawmakers tried a similar approach in 2010 with what was known as SB 1070. It was challenged by the U.S. Justice Department as well as by various civil and immigrant rights groups.

Proponents argued the state had the right to take such measures due to failure of the federal government to secure the border. They also argued they weren’t enforcing federal immigration laws but creating state crimes that happened to affect those not here legally.

The U.S. Supreme Court didn’t see it that way.

In their 2012 ruling, a majority of the justices voided three sections of the measure that would have specifically given state and local police the power to charge people here illegally with violating state laws for:

β€” Seeking work in Arizona without being in this country legally;

β€” Failing to carry federally issued registration cards;

β€” Allowing warrantless arrests if there was β€œprobable cause’’ a person committed an offense that made them removable from the country under federal law.

The court’s majority said all three provisions illegally conflicted with federal law.

The ruling was not unanimous. Justice Antonin Scalia said he saw no conflict between federal immigration laws and the rest of what was in SB 1070.

β€œThe laws under challenge here do not extend or revise immigration restrictions, but merely enforce those restrictions more effectively,’’ he wrote. β€œIf securing its territory in this fashion is not within the power of Arizona, we should cease referring to it as a sovereign state.’’

Shamp did not specifically address the Supreme Court ruling, saying her goal in proposing new legislation is to β€œtake the handcuffs off law enforcement.’’

But in a statement to Capitol Media Services, the senator said she thinks there would be a different outcome than SB 1070’s if this one is challenged. She said the situation is different now.

β€œWhat was once an issue is now an invasion,’’ Shamp said. β€œWe’re not trying to enforce immigration policy. We’re trying to give our state and local law enforcement officers the tools they need to protect Arizona citizens.’’

She also said the specific laws she proposes are different from the ones the Supreme Court struck down.

β€œThere’s a different court,’’ Shamp also noted.

But Justin Cox, an attorney who was part of the litigation that resulted in the Supreme Court overturning most of the 2010 Arizona law, said he thinks Shamp is mistaken if she thinks this will survive litigation. That’s if the senator could somehow even get Democratic Gov. Katie Hobbs, who would not comment on the measure, to sign it.

SB 1231 is worse than the 2010 law, Cox told Capitol Media Services.

β€œIt’s crystal clear the Constitution says only the federal government can decide what’s a crime vis-a-vis our border,’’ he said.

Cox said proponents of the 2010 law sought to get around that absolute prohibition by claiming they were not trying to create new state laws dealing with illegal immigration.

β€œIt sort of had the pretense that state and local officials are just authorized now to help the feds enforce federal immigration,’’ said Cox, who represented the national ACLU in the prior litigation.

Cox, now a consultant for various nonprofit organizations, said Shamp’s proposal doesn’t even try to argue that it’s simply the state helping the feds enforce their laws.

β€œI think it goes further,’’ he said. SB 1231 is titled β€œState crime; illegal border crossings.’’

The legislation does have some limits.

It would give anyone who is arrested an β€œaffirmative defense’’ β€” essentially an argument that can be made to a judge β€” that they had been granted asylum. The same defense would be available to those in the Deferred Action for Childhood Arrivals Program instituted under the Obama administration to allow those who arrived as children to remain and to work.

The proposal would also prohibit police from detaining or arresting anyone under its provisions who is at a public or private private or postsecondary educational institution.

Also off limits would be arrests at a church, synagogue or other β€œestablished place of religious worship.’’

And those in a health-care facility or doctor’s office also could not be arrested if the person is there to receive medical treatment.

But the legislation says a court couldn’t delay prosecution simply on the basis that there was a pending federal determination of that person’s immigration status.

SB 1231 also would provide immunity against civil suit for any local or state official or contractor who enforced the law. The only exception would be if the official β€œacted in bad faith, with conscious indifference or with recklessness.’’

One section of the 2010 law did survive the Supreme Court: the β€œpapers, please’’ provision that requires that police officers, when possible, check the immigration status of people they have already stopped for some other reason.

Foes had tried to show the law was racially motivated. But the Supreme Court refused to immediately void it.

β€œThere is a basic uncertainty about what the law means and how it will be enforced,’’ wrote Justice Anthony Kennedy. That sent the issue back to U.S. District Court Judge Susan Bolton.

She concluded that while it might be that most of the people affected in Arizona are Hispanic, the law itself is racially neutral.

Challengers agreed not to appeal in exchange for the state Attorney General’s Office issuing an informal legal opinion spelling out for police officers how they can β€” and cannot β€” enforce the statute. That also includes cautions against racial profiling.

That also means no delay while waiting for a radioed response from federal immigration officials about whether the person is legally entitled to be in this country.

That guidance also says that even if the person is not here legally, police cannot keep them from leaving while awaiting an immigration officer to come and take custody unless they are under arrest for some state offense.

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Howard Fischer is a veteran journalist who has been reporting since 1970 and covering state politics and the Legislature since 1982. Follow him on X, formerly known as Twitter, and Threads at @azcapmedia or email azcapmedia@gmail.com.