I did a little more research and found that the Princeton thesis is not as strong as alleged by her opponents. It shows some feelings of alienation but I don't think this should be an issue. Here are excerpts from that thesis

"My experiences at Princeton have made me far more aware of my 'blackness' than ever before," the future Mrs. Obama wrote in her thesis introduction. "I have found that at Princeton, no matter how liberal and open-minded some of my white professors and classmates try to be toward me, I sometimes feel like a visitor on campus; as if I really don't belong. Regardless of the circumstances underwhich I interact with whites at Princeton, it often seems as if, to them, I will always be black first and a student second"

That sounds more like her. The smear was similar to the 'Obama is a crazed Muslim' emails going around. Most people don't care about any of that this year. Too much way more important matters to worry about.