As the Washington political class waits for the U.S. Supreme Court to hand down decisions in such hotly contested cases as the challenge to the Affordable Care Act and the constitutionality of Arizona’s immigration law, there is evidence that the public at large is losing confidence in the Court as an impartial arbiter of justice. In a New York Times/CBS poll released last week, only 44 percent of Americans approved of the job the Court is doing — down from a highs in the mid-60s during the late 1980s. This rating is even lower than the results in a Pew…