Here’s one we missed this week. An InsiderAdvantage poll conducted March 26 had Barack Obama leading Hillary Clinton 49 percent to 34 percent in North Carolina, which votes May 6, Seventeen percent were undecided. The margin of error is 5 percent. Matt Towery of InsiderAdvantage said, “Most troubling for Clinton is that the trends in our polling of North Carolina show that a modest but significant portion of whites are drifting from Clinton back into the `undecided’ column. Twenty percent of whites are undecided.” He added that the controversy over Obama’s ex-pastor had not alienated enough whites to significantly change that dynamic. This poll’s resuls generally square with one conducted March 24 by Public Policy Polling.