Does Mattis resignation mean Trump is now unchecked?

Yet another departure from the Trump cabinet. US Defense Secretary Jim Mattis has handed in his letter of resignation in protest at President Donald Trump's decision to withdraw American forces from Syria. What does losing Mattis mean for Trump? What does it mean for NATO? Carl Nasman spoke with Meagan Milloy, co-founder of Republican Women for Progress, and DW Political Correspondent Hans Brandt.