A Question of Discretion
The Obama administration's immigration policy has been one of prosecutorial discretion. After failing to pass the DREAM Act, the administration acted unilaterally to choose not to deport certain individuals who would have received amnesty had the DREAM Act become law. The Department of Homeland Security (DHS) and Immigration and Customs Enforcement (ICE) are charged with deporting all those individuals who immigrated here illegally. The union of ICE workers has filed a lawsuit against the DHS. A recent article in the Washington Examiner details the case.
During the Senate Judiciary Committee's hearing on comprehensive immigration reform, Senator Sessions said of the ICE union,
“They weren’t complaining about pay, benefits, working conditions — they were saying their very oath they took to enforce the law is being blocked by rules and regulations and policies established from on high, and that this is undermining their ability to do what they are sworn to do.”