As pointed out in the comments to this post, my prediction hasn't turned out exactly correct. It isn't the administration itself that is using false charges of racism to attempt to suppress dissent, it is other members of his party. And in fact Obama has tried to get the race baiters to shut up.
My prediction also is not panning out in another important way: namely that these false accusations of racism don't seem to be making race relations in this country worse. People actually seem to be seeing these charges for the slanders that they are. The effect may actually be beneficial if it can get Americans used to evaluating charges of racism on the merits and not just believing whatever the liberal press tells them.