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BOSTON, MA - JANUARY 28: U.S. Senator Elizabeth Warren speaks at a demonstration against the new ban on immigration issued by President Donald Trump at Logan International Airport on January 28, 2017 in Boston, Massachusetts. President Trump signed an executive order that halted refugees and residents from predominantly Muslim countries from entering the United States. (Photo by Scott Eisen/Getty Images)

BOSTON, MA - JANUARY 28: U.S. Senator Elizabeth Warren speaks at a demonstration against the new ban on immigration issued by President Donald Trump at Logan International Airport on January 28, 2017 in Boston, Massachusetts. President Trump signed an executive order that halted refugees and residents from predominantly Muslim countries from entering the United States. (Photo by Scott Eisen/Getty Images)