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8 year oldAnxiety about the economy, terrorism and mass migration are providing "fertile terrain for reactionary politicians and demagogues peddling xenophobia, nationalism and isolationism," Biden said in his speech.
While not mentioning Trump by name, Biden said: "To play to our fears rather than, as Abraham Lincoln said, to appeal to our better angels, build walls instead of bridges — it has been un-American what we have been seeing ... It's not who we have become. It is not who we are."
Biden also said that "some politicians find it convenient to scapegoat immigrants instead of welcoming them" and plan to "build walls between nations when we should be building bridges among us."
Trump, who has called for a wall along the U.S-Mexican border to stop illegal immigration, visited Scotland to reopen one of his golf courses.
The presumptive Republican presidential nominee also praised the United Kingdom for its vote to leave the European Union, and he mocked Democratic opponent Hillary Clinton and President Obama for opposing the "Brexit" vote, saying they do not understand people's concerns about open borders.
Obama is "constantly dictating to the world what they should do," Trump said. "He got it totally wrong."
Clinton opposed Brexit because Obama did, Trump said, adding: "She has always misread everything."
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