"He. Wasn't. Going. To. Win. He DEFINITELY wasn't going to beat Hillary. And he wouldn't have won any other race either. Nor will he win the Republican primaries, so the 2008 question is really irrelevant."
That begs the question of why he is brought up anytime 2008 is discussed.
Because he's a good guy and he's clearly thinking about running. He'll never make it past the primaries.