President Donald Trump’s executive order challenges the long-standing interpretation of birthright citizenship, arguing it should not apply to children of undocumented immigrants. NBC News’ Laura Jarrett speaks with Lucy Salyer, history professor at University of New Hampshire along with a descendant of Wong Kim Ark — the man behind the landmark 1898 Supreme Court case that solidified birthright citizenship in America — about the broader message it sends if the DOJ succeeds in ending birthright citizenship.