US stocks set for a positive open as political concerns rumble on By: CNBC.com News March 14, 2018 at 05:54 AM EDT U.S. stock index futures posted slight gains ahead of Wednesday’s open, as investors tried to shake off domestic political concerns. Read More >> Related Stocks: Dow Industrials SPDR PowerShares QQQ S&P 500 Ishares Core ETF SPDR S&P 500 ETF Trust