Can Texas write its own border laws?

A man walks his dog on the Mexican side of a section of the U.S.-Mexican Border wall on Wednesday morning, September 7th, 2022, as seen from Cameron County, Texas
A man walks his dog on the Mexican side of a section of the U.S.-Mexican Border wall on Wednesday morning, September 7th, 2022, as seen from Cameron County, Texas
Reginald Mathalone via Reuters Connect

Federal courts played a game of injunction ping-pong this week with Texas’ controversial new immigration law known as SB4, which would dramatically expand the Lone Star State’s power at the border. The law would allow Texas police to detain people suspected of entering the US illegally and enable Texas judges to deport them – powers that have traditionally fallen under federal jurisdiction.

The law briefly came into effect Tuesday after the US Supreme Court declined an emergency application from the Biden administration arguing it violated federal authority. Within hours, the 5th Circuit Court of Appeals reinstated an injunction on enforcement, and on Wednesday that court heard arguments on the constitutionality of the law – one step in a process that could take the case back to SCOTUS.

The key question is whether states may write their own immigration laws even if they conflict with existing federal law, according to Eurasia Group analyst Noah Daponte-Smith.

“If the court ruled the entire law constitutional, that may open the door to conflictual federal and state immigration policies and would raise big questions about enforcement,” he says.

And Texas is finding it takes two to tango in foreign relations. Mexico’s Ministry of Foreign Affairs made clear it does not recognize Texas’ own border policy and will not accept any attempted repatriations from state authorities.

More from GZERO Media

In this new episode of Tools and Weapons, Microsoft Vice Chair and President Brad Smith sits down with Ted Sarandos to discuss how bold leadership and a culture of innovation keep Netflix ahead, not just as a media company, but as a force shaping both industries and audiences. Ted shares how intuition and data combine to turn daring ideas into practical solutions, from scaling storytelling across 190 countries to relentlessly creating content that gets under the skin of viewers and makes them feel deeply connected to the stories they watch. Subscribe and find new episodes monthly, wherever you listen to podcasts.

Russian President Vladimir Putin chairs a meeting with members of the Security Council via video link at the Kremlin in Moscow, Russia, on October 24, 2025.
Sputnik/Alexey Babushkin/Pool via REUTERS

The US president imposed sanctions on the two largest Russian oil firms. The effectiveness of this strategy depends on whether it forces China and India to stop buying Russian crude.

- YouTube

The real US-China AI race isn’t about who builds the most powerful technology, but who applies and governs it in ways that strengthen—rather than undermine—society, Tristan Harris tells Ian Bremmer on GZERO World.