The reference was implicit, but also unmistakable:

"After the United States Supreme Court issued a 5–4 ruling overturning a lower court injunction that prevented federal agents from removing razor wire the state had placed along the border, Governor Greg Abbott pushed back, rejecting the court’s authority and declaring that “the federal government has broken the compact between the United States and the states.”

That language is familiar to historians of the Civil War and to legal scholars. The “compact theory” of the U.S. Constitution was used to justify the Confederate secessions of 1861, and was rejected all the way back in Texas v. White. Abbott, a former state Supreme Court justice and attorney general, is certainly aware of the history of the term and the century and a half of court rulings that reject the theory behind it."

https://www.texasmonthly.com/news-politics/texas-secession-movement-abbott-border-security/