A debate between these two would be a delight to see. From Google News/Associated Press:
Sharpton threatens to sue Rush over op-ed remarks
The Rev. Al Sharpton is threatening to sue Rush Limbaugh for writing that the civil rights leader played a role in two New York race riots.
Limbaugh wrote that Sharpton played "a leading role in the 1991 Crown Heights riot" and the "1995 Freddie's Fashion Mart riot" in a Wall Street Journal column published Saturday. Sharpton called both allegations false.
Wiki on Crown Heights and Al Sharpton (has entries for the two riots plus much much more)