So, the DoJ is suing Abbott, and from this brief, I'd say he's going to get his ass kicked.

His current theory seems to be to deny that the Rio Grande somehow doesn't fall under the purview of the Rivers and Harbors Act, and that the Army Corps of Engineers is part of the "weaponized Deep State".

Good luck to him with that.

https://www.documentcloud.org/documents/23885825-usvabbottborderbuoyscomp072423