The border disaster is Trump's making. He's the guy that drove illegal immigration to record numbers and declaring a National Emergency in 2019. When Trump took office, illegal immigration was at its lowest level in 50 years. Thank you President Obama.
Trump created the crisis to justify building the Wall. And he destroyed the entire immigration support system at the Southern Border, replacing them with camps for run by his inauguration donors in the "for profit" prison industry. And left the mess for Biden to clean up with no resources, no legislation, and border state governors looking to make a name for themselves with cruelty to migrants.