The Declaration refers to the need for laws for the naturalization of foreigners, and complains of the king's obstruction of such laws. The Constitution gives Congress the power to "establish an uniform rule of naturalization."  The common principles are the willingness to accept some immigration and for these legal immigrants to have ways to become naturalized citizens, and the need for this process to be governed by law. There are limits as to how many immigrants we can accept at a time, and still be able to assimilate them and retain our character as a free country. Now we have a flood of immigrants coming into the country illegally. We need to enforce the law, and to secure the border.

When illegal immigrants are referred to as "undocumented workers," you can be sure that the speaker does not want the border secured, and wants the illegal entries to continue. Why? Many on the political left want the flow of illegals to continue, and to make them citizens and give them the vote. They believe it will allow them to gain permanent power. (They want felons to vote also, and for the same reason.) It is easy to sympathize with those who come up from Mexico out of desperation, because of the lack of freedom and economic opportunity there. However, not only are they breaking our law, but many of the illegals now show a different attitude from those who came before them. They lack respect not only for our law, but for the United States; they show no desire to assimilate nor to learn the language; they have the arrogance to make "demands," when they do not even have a right to be here, and they march through our streets with Mexican flags. To turn this country into a clone of Mexico would mean destroying our economy, our Constitution, and our freedom.