President Donald Trump promised his supporters “the largest deportation program in American history” — but he’s nowhere close.

That distinction belongs to an early 20th-century program that likely saw 2 million people deported. When looking at more recent times, it’s President Barack Obama — once dubbed by immigrant advocates “the deporter in chief” — who holds the 21st-century deportation record. His administration kicked out 438,421 people in 2013. No president since has come close to equaling that record, including Trump during his first term.

The political atmosphere that made the mass deportations of the 1900s possible is long gone. Similarly, Trump is likely to find it all but impossible to approach his goal of deporting “millions and millions” by borrowing from Obama’s playbook.

In fact, actions taken by Obama are part of why Trump’s ambitions have been stymied. If Trump truly wants to set a new record, he’ll need to more than double the current pace of deportations. And that will take a strategy that radically departs from those that have come before.

How Obama deported so many people

Obama’s immigration enforcement strategy was two-pronged: increasing penalties for unauthorized crossings at the southern border and deputizing local law enforcement to target immigrants with criminal records inside the US. The former increased the number of people who faced official removal proceedings and deterred repeat border crossers. And the latter allowed ICE to have its ear to the ground in........

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