He explained it multiple times.

I have quoted that explanation many times in this thread. Here it is again:

With regards to the comment he made about the President being a racist:

“It shouldn’t have been said; it was poorly said; I have a big fat mouth sometimes, and I say things, … and that’s not the way people should behave, and it was not accurate,”

Somehow some people here (who have said things that they regret, and would hope people would forgive and MOVEON) don’t seem to consider that important.