The calls for Texas to defend itself and defy the federal government have set fire to a long-simmering fight over states’ rights, emboldening right-wing figures.

Daniel Miller felt encouraged last week, as fears of a new civil war trended online and a coalition of powerful Republicans coalesced behind Gov. Greg Abbott’s standoff with the Biden administration.

As the longtime leader of Texas’ unlikely secessionist movement, Miller has for decades argued that the state is in a stranglehold by the federal government that, eventually, would prompt enough popular support for a vote to leave the union. The past week only reinforced that belief.

"It validates and confirms the position we've had all along, which is that if Texas ever wants to truly secure its border … the only way we’re going to do it is as an independent and self-governing nation,” Miller said in an interview.

At issue is the 47-acre Shelby Park in Eagle Pass, where Texas has for months been laying concertina wire along the Rio Grande to prevent migrants from crossing. In a 5-4 decision early last week, the U.S. Supreme Court sided with the Biden administration, allowing U.S. Border Patrol agents to cut the wire to apprehend people who had crossed the river.

The narrowly written decision — which didn’t speak to whether the state had to stop laying new concertina wire — has emboldened Abbott, who vowed to continue his fight against the high court and federal government, citing Texas’ right to defend itself from what he claims is an “invasion” of migrants.

By week’s end — and as the Texas National Guard and state troopers continued to roll out wire and stifle federal agents’ access to much of the park — Abbott’s defiant calls were backed by 25 Republican governors, former President Donald Trump, U.S. House Speaker Mike Johnson and nearly all of Texas’ congressional delegation.