What lack of experience?

Andrew Sullivan posted a brilliant piece of analysis by one of his readers (from whom I quoted in the previous post). The take on Obama: "I wish people would realize that we have a President that was born in the USA, raised in Asia and multi-cultural Hawaii, and who lived in Harlem, and went to uppity Harvard and then spent a lot of time in African-American ‘hoods. Oh, and he’s driven up and down the rural highways of Illinois hundreds of times. Furthermore, much of his life was spent in obscurity so he had to live amongst us normal people paying back student loans. Even as a Senator he lived in a run down apartment in D.C. This is why I never worried about Obama’s lack of experience. All he’s had is experience. ... Have we ever had a President that has lived in this many American worlds and cultures and succeeded in all of them?"