WASHINGTON (Reuters) - The U.S. trade deficit narrowed unexpectedly to $55.0 billion in March in the largest monthly drop in over three years, as exports rose to a new record and clothing and other imports from China declined, a U.S. government report showed on Wednesday. The 9.2 percent plunge in the deficit defied Wall Street forecasts. Analysts had expected high oil prices and a flood of clothing from China to push the monthly trade gap to around $61.5 billion, which would have been a new record. The sharp pullback in imports offered further evidence that the economy hit a soft...