Unauthorized immigration has declined or remained flat since its rapid growth in the 1990s and early 2000s, according to estimates by the Migration Policy Institute and Pew Research Center. While the surge in Central Americans trying to cross the border has attracted recent headlines, there has been a steady decline in the number of unauthorized immigrants from Mexico.
In recent years roughly two-thirds of new, unauthorized immigrants came to the US legally, but overstayed their visas, as opposed to illegally crossing the border. In other words, the former guy was wasting time and money building a southern border wall while the overwhelming majority of unauthorized immigrants were coming here legally. Put that in your pipe and smoke it, Ted Cruz and Greg Abbott!