George Mitchell, the former U.S. Senate majority leader, says opposition to Donald Trump's executive orders isn't only along political lines. Prior to that, Fawaz Gerges, a professor at the London School of Economics, says Trump's immigration ban is a propaganda boost for ISIS. Nicholas Burns, a professor at Harvard University's Kennedy School, says strong vetting is already in place and Trump's executive order was unnecessary. Edward Alden, a senior fellow at the Council of Foreign Relations, says illegal immigration is back down to levels from the 1960s and 1970s. Finally, Representative Robert Bishop, chairman of the House Energy and Resources Committee, says Secretary of Defense James Mattis has shown that he is willing to work with Congress.