Al Sharpton - Why Does The DNC Bother?

I have no idea why they give this guy time on stage. He's so disreputable and as a so-called "presidential candidate", he added nothing to the political debate, except for a few cute soundbites. I recall when asked about the Federal Reserve, he jerked and stammered like a palsy victim and clearly had no idea how the system works. Anyway, Michelle Malkin has dissected him and has posted some of his greatest hits, including the Tawana Brawley incident and his FBI drug deal attempt caught on tape. Why, oh why, DNC?!!