Republican presidential hopeful Lamar Alexander is in Cedar Rapids thisafternoon to speak at the International Ethanol Fuel Workshop and TradeShow. Earlier this year, Alexander called for a ban on M-T-B-E, an oil-based fueladditive which competes with corn-based ethanol. Alexander says M-T-B-E poisons the groundwater and ethanol is a logicalsubstitute.On June 12th, George W. Bush — the front-runner in the republicanpresidential race — said he supports the federal tax break for ethanol. Alexander says Bush is merely giving “lip service” to a law that’s alreadyon the books.