"That One"

I am more interested in this comment from a tactical POV.

I must say that McCain couldn't have been thinking before he spoke when he made this comment. Had he said "that man" or "that guy" or preferably just "Senator Obama" it wouldn't have raised an eyebrow. But "that one?" Seriously, those two words can break open a floodgate of dissent from all but those who fervently support McCain. I usually don't make a big deal about gaffes unless they are completely ridiculous, but I have to call McCain out on this one because using "that one" in reference to a minority is bound to cause an uproar.