The Justice Department's lawsuit against Standard & Poor's could affect the industry for years, Lauren Tara LaCapra and Karen Freifeld write. "This is a very serious challenge. It resurrects all the legacy concerns about ratings agencies," said Edward Atorino of The Benchmark Company. While S&P plans to defend itself in court, experts say there is a risk that other ratings agencies will be damaged as well. Meanwhile, some Democratic lawmakers voiced support for the lawsuit.