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.
Our immigration laws exist for good reasons: to protect our safety, our national sovereignty, our standard of living, our health, and our culture. Those who break them may want a better life for themselves, but then again, so do all who enrich themselves by disregarding the law.