Article 1, Section 8, Clause 4 (Citizenship)
Document 2
Declaration of Independence
4 July 1776--He has endeavoured to prevent the population of these States; for that purpose obstructing the Laws for Naturalization of Foreigners; refusing to pass others to encourage their migration hither, and raising the conditions of new Appropriations of Lands.
The Founders' Constitution
Volume 2, Article 1, Section 8, Clause 4 (Citizenship), Document 2
http://press-pubs.uchicago.edu/founders/documents/a1_8_4_citizenships2.html
The University of Chicago Press