US stock futures hit pause on Tuesday, with investors looking past Venezuela concerns after Nvidia (NVDA) and AMD (AMD) laid out their next-generation AI platforms. Contracts on the S&P 500 (ES=F) and the tech-heavy Nasdaq 100 (NQ=F) hovered just below the flat line. Dow Jones Industrial Average futures (YM=F) were also little changed on the heels of Monday's record-setting rally. Stocks are holding steady as investors assess Nvidia and AMD's competing bids to shape the future of AI, laid out at the tec ...