Based on an
analysis for 5 million people, the Centre for American Progress estimates that a mass deportation from the US would cost an average of $10,070 (£6,624) per person. For 11.3 million people, that's $114bn (£75bn).
And that would cover only the basic operational costs - apprehension, detention, legal processing, and deportation. According to the AAF, the total cost of a 20-year mass deportation programme would be somewhere between $420 and $620 billion.
But we're not finished yet, there's still the impact on the economy. The AAF report, published earlier this year, estimates that undocumented immigrants made up 6.4% of the country's labour force - about 11 million workers - in 2014.
It predicts that deporting all of those workers would shrink the US economy by nearly 6%, or $1.6 trillion, by 2035.