By obfuscating terminology liberals sometimes can be heard to claim that President Obama has deported more illegal aliens than any previous president. NOT TRUE.
There are two types of border enforcement actions:   “Returns” and “Removals”.
“Returns” are those stopped at the border and sent immediately back; the ones caught.
“Removals” are those who get through the border and are caught later on.
No previous administration has counted “returns” as deported, until Obama. What Obama is doing is counting those who are stopped at the border, the “returns”, as deported.
To fairly compare deportation -as a measure of commitment to emigration integrity- one must look at “enforcement actions” – ie. those who have been removed from the country after they have successfully snuck in.
DHS Yearbook of Immigration Statistics – Enforcement Analysis – Table 39:

Even Obama himself admitted in 2011 he was fudging the numbers to make himself look better.
Remember, truth is a relative term:  “If you like your healthcare plan, you can keep your healthcare plan“….
Now, about that $3.7 billion…..