I also don't think Lott should be removed from the leadership for a silly comment at a birthday party. I think everyone has at one time or another said something silly that he regrets, and perhaps something silly at a birthday party. To remove Trent under these circumstances would fall into the PC of the hard left.
Trent is forced out over this, it would be like the 1830 Democrat birthday gathering for the late Thomas Jefferson. At that birthday party, the President Jackson (TN) challenged Vice President Calhoun (SC) over the status of the federal union. In time, Calhoun resigned the vice presidency and became a Jackson critic, but all within the Democrat party. So it would be hard to imagine that Thurmond's birthday party would be relegated to such importance as the first of the Jefferson-Jackson dinner.