US stock futures edged lower on Wednesday as uncertainty over a potential government shutdown weighed on sentiment. The shutdown is set to begin at midnight unless Congress reaches a temporary funding deal, with Republicans and Democrats trading blame for the standoff. Investors are watching closely how long a closure might last, as an extended shutdown could delay key economic releases ahead of the Federal Reserve’s late-October policy meeting, including Friday’s nonfarm payrolls report. Meanwhile, ADP’s private payrolls data is due later today. On Tuesday, the Dow added 0.18%, the S&P 500 gained 0.41%, and the Nasdaq rose 0.3%, with all three indexes finishing September and the third quarter with solid advances. In corporate news, Nike shares surged 4.5% in after-hours trading after reporting stronger-than-expected first-quarter earnings and revenue.