I am guessing this rather inexpensive and quickly deployed effort is having a significant effect. It may not be a good as a wall, but it may be stopping many of them.
They should have put crocs in the Rio Grand.
It isn’t as if the Rio Grande has major commerce that is being interfered with-the only thing that is being shipped across from Mexico there is mojados and illegal drugs-Mexico is just pissed because there is not as much drug and human smuggling money bribes being paid by los carteles with that barrier in place...