It's time to "fight fire with fire." That's Assembly Speaker Sheldon Silver's message to his fellow Democrat, Gov. Spitzer, when it comes to dealing with the governor's arch political enemy, and New York's top Republican, Senate Majority Leader Joe Bruno. (snip) The speaker yesterday urged the governor to exercise his right to appoint a Moreland commission, which would have subpoena power and the ability to investigate "whatever it is they want to look into." "I think it's appropriate to do the same thing [the Senate Republicans] are doing, which is basically to do a fishing expedition," Silver said. "It's tit...