In this recording, produced for Constitution Day 2006, UT-Austin professor of Government Gretchen Ritter discusses the constitutional idea of citizenship. She notes that the U.S. Constitution says little about citizenship. Several amendments, notably the 14th, 15th, and 19th Amendments, fill this gap in the Constitution. But they have been subject to various interpretations. The result is that citizenship in the U.S. is underspecified, constitutionally speaking at least.