Futures steady after Wall St selloff on trade war worries

U.S. stock index futures were flat on Tuesday following a selloff on Wall Street in the previous session when President Donald Trump imposed tariffs on trade partners that could intensify a growth-denting global trade war. At 5:32 a.m. ET, Dow E-minis were down 44 points, or 0.10%, S&P 500 E-minis…