The Migration Policy Institute has released data that the U.S. government has spent $18 billion on immigration enforcement in the last fiscal year.  This expense dwarfs the amounts spent at any of the other law enforcement agencies the government runs. 

The $18 billion was spent across immigration enforcement programs run by Immigration and Customs, Border Patrol and U.S.-Visit program.  Since 1986, according to AP, the U.S. government has spent $187 billion on immigration enforcement.  Last year’s fiscal spend on immigration enforcement tops the combined budgets of the FBI, ATF, DEA and Secret Service by some $3.6 billion.

The Migration Policy Institute noted that President Obama has made immigration enforcement a top legal priority. 

In 2012 410,000 people were deported from the U.S. , which was slightly higher than 2011 when 396,906 undocumented immigrants were deported. And a larger number of individuals are detained each year in the immigration detention system (just under 430,000 in fiscal 2011) than are serving sentences in federal Bureau of Prisons facilities for all other federal crimes.