From the war on anarchism to President Trump’s extreme vetting policies, the U.S. government’s practice of using the border as a justification to exclude ideas considered “dangerous” is as American as apple pie. In the first episode of “Views on First: Speech & the Border,” host George Wang invites lawyer and historian Julia Rose Kraut to explore the history of ideological exclusion and the government’s authority to bar individuals from the country on the basis of their speech, beliefs, a...