U.S. stock futures fell on Tuesday following Monday’s mixed moves. Futures of major benchmark indices were lower.The Advanced Micro Devices Inc. (NASDAQ:AMD) deal with OpenAI fueled the rally in AI-linked stocks on Monday, which has been powering Wall Street’s bull run this year.Meanwhile, President Donald Trump indicated willingness to work with the Democrats on healthcare and other policies, but only after they reopened the government, which is in its seventh day of a shutdown that began on Oct. 1. The U. ...