NEW YORK (AP) — A monster financial forecast from one of Wall Street’s most influential stocks is helping to yank the stock market higher even as worries worsen about political rancor in Washington. The S&P 500 was 0.6% higher in early trading Thursday after chipmaker Nvidia reported stronger profit and revenue than expected for the latest quarter, benefiting from the tech world’s rush into artificial intelligence. It helped the Nasdaq composite soar 1.5%. The Dow Jones Industrial Average slipped 0.3%. Because it’s one of the most valuable stocks on Wall Street, Nvidia’s 23% surge was the strongest force pushing upward...