The latest book on the 2008 election came out this week and Senate Majority Leader Harry Reid gave some quotes about Obama that came off as racist and that he won because did not use "Negro speak" as much and he wasn't really that black. He did immediately apologize and Obama said it was a dead issue. There were Republican leaders calling on him to resign.
I think Obama should have denounced the remarks as unacceptable but these weren't made in a public setting as were the 2002 Trent Lott remarks. Since it involved the president he did not want to drag it out since it distracts from real news.