Obama winning a primary is only important (outside of political circles) if a plane doesn't crash on the same day.
I think every non-hacker story should be evaluated by the "plane crash beating" quality. :-)
If he won the presidency, that would possibly be plane crash important.
The news item was actually interesting for me, because it was the first time I watched a video of Obama. Also, I think he is under special scrutiny, and his speech seems to refer a lot to that, doesn't it? At least I thought the "change" meant that there might be a black president of the US after all?
Not trying to argue that it belongs on news.yc, but so far news.yc did a fine job filtering out the most interesting mainstream news (including the best xkcd cartoons, apparently).