The inflation-busting chief of the Federal Reserve made it clear to Congress today that he's getting antsy to raise interest rates again (the Fed's already done so six times this year). Democrats balked, fearing a slowing of the robust economy, butFed Chairman AlanGreenspan said that he was worried about the rising cost of raw materials in the face of healthy demand, which, he said, might lead to higher prices. But Democrats disagreed, saying that another rate hike couldn't be justified. "The current interest rate policies being pursued by the Fed are just dead wrong. They will hurt rather than help this country," said Byron Dorgan (D-N.D.), a frequent Fed critic.