Texas Attorney General Ken Paxton.
Texas Attorney General Ken Paxton. Marjorie Kamys Cotera

Attorney General Ken Paxton is looking to get ahead of an anticipated barrage of legal challenges to Texas’ ban on “sanctuary cities,” which takes effect Sept. 1.

Shortly after Gov. Greg Abbott signed Senate Bill 4 into law on Sunday, Paxton filed a lawsuit โ€” known as a complaint for declaratory judgment โ€” asking a federal court to declare the law constitutional. The lawsuit specifically asks the U.S. District Court for the Western District of Texasย to rule the law does not violate the 4th or 14th amendments to the U.S. Constitution and is not pre-empted by federal law.

“SB 4 is constitutional, lawful and a vital step in securing our borders,” Paxton said in a statement. ย 

The lawsuit was filed against the government and elected officials in Travis County, which has been a battleground in Texas Republicans’ push to crack down on criminal suspects living in the United States illegally. The county’s sheriff, Sally Hernandez, drew Abbott’s ire earlier this year when she announcedย that her department would reduce its cooperation with federal immigration authorities.ย 

SB 4 aims to punish local law enforcement officials ifย they donโ€™t honor requests from federal immigration agents to hold noncitizen inmates who are subject to deportation. The law also includes a controversial provision that allowsย police to inquire about the immigration status of people they lawfully detain.

Even before Abbott signed the legislation, Democrats and immigrants’ rights groups were vowing to challenge it in court. If successful, Paxton’s lawsuit could limit the scale of the anticipated legal battle over SB 4.

Opponents of the law said they were not deterred by Paxton’s lawsuit. One of the defendants, the Mexican American Legal Defense and Educational Fund, called the attorney general’s move a “frivolous legal action, filed precipitously and without basis in the law.”

“We will see you in court, Governor Abbott,” Thomas Saenz, MALDEF’s president and general counsel, said in a statement. “In the meantime, we hope that both the governor and attorney general will seek treatment for an apparent problem with premature litigation.”

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Patrick Svitek was the primary political correspondent for The Texas Tribune. Patrick covered elections, state leaders, the Legislature and political trends across the state from 2015 until 2024. He previously...