US stock futures fell on Tuesday in the wait for the Federal Reserve meeting to start, as investors gauged the impact of President Trump's tariffs on its decision making and the path of interest rates.

U.S. stock futures were little changed Sunday night as Wall Street comes off a winning week, with the S&P 500 logging its longest positive streak in two decades. Futures tied to the S&P 500 fell 0.2%. Dow Jones Industrial Average futures dropped 100 points, or 0.2% and Nasdaq-100 futures ticked down 0.2%.