A friend from near Laredo, Texas told me the County Sheriffs might deputize qualified people and turn them back at the river. The Deputies would be armed.
Before going to “constitutional carry” Texas had over a million citizens licensed to carry, who had all been thoroughly background checked and fingerprinted. I would tap this pool of citizens first, as I recommended to Greg Abbott three years ago. Something must be done ... and now.
Razor wire is pretty cheap and very quick to install.