The main purpose of this legislation is to clarify the rules surrounding birthright citizenship in the United States. It aims to specify who qualifies for citizenship based on their birth in the country, particularly focusing on the status of the parents at the time of the child's birth. The key provision of this legislation changes the definition of "subject to the jurisdiction thereof" in relation to birthright citizenship. Under the new definition, a person born in the United States will only be considered a citizen if at least one parent is either a U.S.