The Department of Homeland Security tracks two types of deportations: returns and removals. It's true that President Obama has "returned" fewer undocumented immigrants than his predecessors. But "returns" refer specifically to immigrants who are stopped at or near the border, so that's to be expected when fewer immigrants are crossing into the U.S. illegally, as has been the case.

The president actually has far more "removals" on record, and that's the more broadly encompassing definition of a deportation, which doesn't just refer to immigrants stopped near the border.