On his first trip back to the nation's first voting state as a soon-to-be declared presidential candidate, former Massachusetts Gov. Mitt Romney reaffirmed his support for federal ethanol subsidies -- an always important campaign issue in Iowa that figures to take on an even more central role in the divided GOP field. "I support the subsidy of ethanol," Romney told a potential voter after an event here was cut short by a fire alarm. "I believe ethanol is an important part of our energy solution in this country." Support for ethanol subsidies has long been considered a political necessity for...