Labrum - a cover which may be loosely referred to as the upper lip. Mandibles - hard, powerful cutting jaws. Maxillae - 'pincers' which are less powerful than the mandibles. They are used to steady and manipulate the food. Labium - the lower cover, often referred to as the lower lip.
The President, as head of the federal executive branch, is ultimately in charge of enforcing the immigration laws of the United States. In turn, he must make discretionary decisions about whether and when to prosecute immigration law violators through deportation and other sanctions.
There's a law for that. There are constitutional limits on what the president can do. We have a tripartite government system. The Congress enacts the laws; the President implements the laws, Yale-Loehr said. The President cannot create an immigration policy willy-nilly, whole cloth. He cannot create an immigration law.