Because, here's what she's really saying to party leaders: There's no way that white people are going to vote for the black guy. Come November, you'll be sorry.

As you point out, this is ridiculous. And Obama won Maine, Iowa, Kansas, Utah, Minnesota, North Dakota, etc, and we've got months and months until the general election, so it's not like he can't improve on those numbers. But Hillary is trying to find a reason for the superdelegates to support her over Obama, and she's doing so in a manner that, if she continues to do so, will destroy our party.