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 opened little changed, with investors likely staying sidelined until they can get more clarity on President Donald Trump's plans for tariffs on Mexican and Canadian goods, inflation and the market for artificial intelligence.

US stock futures wavered on Tuesday, as President Donald Trump's revived tariff threats and potential toughening of China curbs weighed on market optimism and the chances of interest-rate cuts. Trump's signal that his trade overhaul isn't over has unsettled markets wondering about the impact on growth prospects.