If the Texas National Guard continues to put up barbed wire, following the lawful orders of Gov Abbot, the Biden administration will call them up, putting them under federal control.
This is what happened when Gov. Orville Faubus attempted to use the Arkansas national guard to prevent school integration after the Supreme Court's Brown vs. Board of Education decision.
Always was. That's where "defund the police" came from. Obama's "Policing in the 21st Century Task force" concluded disbanding lical PDs and replacing them with a federal police force.
https://obamawhitehouse.archives.gov/blog/2014/12/18/president-obama-creates-task-force-21st-century-policing