Again stealing text from NumbersUSA until I can write my own synopsis.
Birthright Citizenship is the practice of offering automatic citizenship to children born in the United States. Under current federal law, all children born in the U.S. receive automatic citizenship, but this practice had created a magnet for foreign nationals who want their children to have citizenship in the United States.
Traditionally, nations that offer Birthright Citizenship do so to increase its own population. Most developed nations have ended the practice of Birthright Citizenship or have never offered it in the first place. The United States is the most populated nation to still offer Birthright Citizenship
A bill to repeal Birthright Citizenship has been offered in the House of Representatives by former Georgia Congressman Nathan Deal. After Rep. Deal’s resignation to run for governor, the bill’s sponsorship was taken over by California Congressman Gary Miller.
The Immigration and Nationality Act defines Birthright Citizenship in the United States, but it’s also a clause in the 14th Amendment of the U.S. Constitution. However, the Supreme Court has never interpreted the Birthright Citizenship clause as it applies to illegal aliens – only legal immigrants.