During his campaign and in the early months of his presidency, Trump's signature immigration move was his proposed border wall with the ever-growing price tag of $25 billion — an effort to turn a frenzied, hatched-by-Cambridge-Analytica campaign chant of "Build the wall!" into government policy, an extreme take on the vaguer notion of "enhanced border security" that many Americans say they support. Less attention was paid to the notion of pushing humans who were already here back over the border, as well as the realities of what stepped-up law enforcement might look like.