President Obama made a pitch Tuesday for Americans to remember their immigrant roots, describing the U.S. as the traditional home for refugees fleeing the world's worst troubles. He compared today's climate of fear over immigration and terrorism to what he called some of the darkest days of the country's immigrant history, such as when black Africans were brought in the slave trade, when Irish and Chinese faced discrimination and when Japanese were pushed into internment camps during World War II. "In the Syrian refugee of today we should see the Jewish refugee of World War II," the president said as...