Only on the "CBS This Morning" podcast, CTM's Vladimir Duthiers visits the Tenement Museum in New York City to speak with its president about the history of immigration in the United States. Kevin Jennings discusses America's history of turning away newcomers and the racial prejudice that has helped shape immigration policy in the United States. He discusses the positive impact immigrants have had on the country and also explains common misconceptions he and his staff hear from museum visitors. For example, he says many people incorrectly assert that their ancestors came to this country legally when for much of our history, America had open borders.

Please note: This conversation was recorded prior to Saturday's mass shooting in El Paso, Texas, when a gunman killed at least 20 people and injured dozens of others in what law enforcement officials are calling an act of domestic terrorism. The suspect allegedly wrote a manifesto in which he denounces the increasing Hispanic population of Texas and gives that as a reason for his actions.