Turns out there are real questions about the accuracy of that recent Quinnipiac poll showing President Obama’s approval rating at just 52 percent among Jewish voters. As the JTA’s Eric Fingerhut pointed out, the Jewish sampling “was derived from a sample of just 71 respondents, for a margin of error of plus or minus 11.6 percent — a sample size that pollsters generally say makes such surveys unreliable.” Actually, common sense and some knowledge of Jewish voting habits should be enough to render any such poll findings suspect at best. Obama enjoys two important advantages that make him almost a...