SANDERS: "Let's all remember that a few years ago Donald Trump was the leader of the so-called birther movement. And what the birther movement was about, Chris, was not being critical of Obama. This is a democracy. We can criticize Obama. It was delegitimizing the first African-American president in the history of our country. And the reason for that was clear. There are racists in this country who could never accept the fact that we had a black president. And that's what Trump was trying to do, delegitimize the president, not disagree with him."