Keep pulling the thread on United States.
The 14th Amendment's Citizenship Clause did not grant citizenship to the children of temporary visitors or illegal aliens.
The phrase "subject to the jurisdiction thereof" in the 14th Amendment means owing direct and immediate allegiance, not merely being subject to laws.
The 14th Amendment embodies the English common law rule that virtually everyone born on U.S. soil is a citizen.
The exceptions to birthright citizenship under the 14th Amendment are a closed set limited to those with a "fiction of extraterritoriality," such as children of diplomats.
For aliens in the United States, lawful domicile is the status that creates the requisite allegiance for their children to be granted citizenship under the 14th Amendment.
The United States' policy of unrestricted birthright citizenship is an outlier, as it contradicts the practice of the overwhelming majority of modern nations.
The U.S. policy of unrestricted birthright citizenship acts as a powerful pull factor for illegal immigration.
The U.S. policy of birthright citizenship has created a "birth tourism" industry, attracting thousands of foreigners from potentially hostile nations.
The Civil Rights Act of 1866, by using the phrase "not subject to any foreign power," repudiated the British common law conception of allegiance.
Senator Trumbull stated that the phrase "subject to the jurisdiction thereof" in the 14th Amendment means "not owing allegiance to anybody else."
Media reports estimate that over 1 million to 1.5 million people have come from the People's Republic of China for birth tourism.
The Supreme Court case Lynch v. Clark held that the U.S.-born daughter of temporary visitors from Ireland, who was taken back to Ireland, was a U.S. citizen.