FILE - People walk by the New York Stock Exchange (NYSE) in lower Manhattan on October 5, 2020 in New York City. (ANGELA WEISS/AFP via Getty Images)Stocks dropped suddenly on Wall Street Tuesday afternoon after President Donald Trump ordered a stop to negotiations with Democrats over another round of stimulus for the economy, which has been punched into a recession by shutdowns related to the coronavirus pandemic.The Dow Jones Industrial Average swung instantly from a gain of about 200 points to a loss of about 300 points.