U.S. stock futures were little changed on Tuesday night, following a volatile session for stocks, as traders digested the latest developments in the U.S.-China trade war. Futures tied to the Dow Jones Industrial Average were trading up 11 points, near the flatline. S&P 500 futures and Nasdaq 100 futures were also little changed. The moves followed a tumultuous day of trading for all three indexes. The S&P 500 attempted to stage a comeback from Tuesday's lows of the day, but ultimately closed