By Lucia Mutikani WASHINGTON (Reuters) – The U.S. trade deficit in goods narrowed in August amid a decline in imports, which is being driven by slowing domestic demand as the Federal Reserve aggressively tightens monetary policy to tame inflation. The report from the Commerce Department on Wednesday suggested that trade would again contribute to gross domestic product in the third quarter. The economy could also get a lift from big gains in wholesale and retail inventories last month. “Trade should be a positive for third-quarter GDP,” said Ryan Sweet, a senior economist at Moody’s Analytics i…