Why does Eminem's freestyle against Donald Trump matter?

Everyone is still talking about Eminem's freestyle ethering Donald Trump. It was the highlight of the BET Hip Hop Awards and trending like crazy today. But this isn't the first time rappers have spoken out against the worst. president. ever. So, why are people talking? I break down the importance of Marshall Mathers speaking out--and what that means to Trump and America for XXL. Peep it here.