White House defends Trump's Mika Brzezinski attack: 'he fights fire with fire'

White House deputy press secretary Sarah Huckabee Sanders defended President Trump's Twitter attack on MSNBC "Morning Joe" co-host Mika Brzezinski on Thursday. She said, "When he gets attacked, he's gonna hit back. I think the American people elected someone who is tough, who is smart and who is a fighter." She continued, "I don't think it's a surprise to anyone that he fights fire with fire."