Wall Street was sluggish in the early going Tuesday as geopolitical concerns and President Donald Trump's trade policies weighed on markets. Futures for the S&P 500 and the Dow Jones Industrial Average are virtually unchanged before the opening bell.

U.S. stocks drifted lower following their sharp losses from last week. The S&P 500 fell 0.5% Monday after flipping between small gains and losses through the day. The Dow Jones Industrial Average added 0.