Sarah Duggin , professor, law, was on MSNBC's The Last Word to discuss the citizenship of Sen. Ted Cruz (minute 2:58). She was also interviewed on the topic by ABC News. See below.

Constitutional Scholars Explain Why Ted Cruz Is Eligible to Be President

From: ABC News Date: Jan. 6, 2016 Author: Ryan Struyk

Facing questions about his nationality before he announced his candidacy for president, Cruz took the unusual step in June 2014 of formally renouncing his Canadian citizenship. Cruz said today on the campaign trail that the question is "settled law." But most scholars agree that the question has not yet been officially resolved."I think there's a scholarly consensus, but it's not a done deal," said Sarah Helene Duggin, a professor at the Catholic University of America, adding that experts aren't unanimous on the issue. "I don't think it's open and shut at all."

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> Read more about Duggin's expertise .

Why Cruz's WH eligibility is not settled law

From: MSNBC Date: Jan. 6, 2016

Sen. Ted Cruz has cited a Harvard Law Review online commentary as proof he is a citizen from birth, but another much more in-depth piece from Boston University calls that into question. The co-author of that BU article, Sarah Duggin, joins Lawrence for more.

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> Read more about Duggin's expertise .