Her aides still don't expect Sen. Clinton to formally concede and endorse Sen. Barack Obama tonight, but if, as seems likely, Obama ends up with more than 2118 delegates by the time she speaks, Sen. Clinton is certain to publicly acknowledge that Obama has crossed the threshold. That means, in essence, that the Democratic primary campaign is over.Umm...so she's doing a non-withdrawal withdrawal? This is a curious way to promote party unity, and I don't think it's going to convince a lot of Clinton critics (e.g. myself) that she's not keeping her options open to try to steal the nomination away at some point in the future.
It seems to me that the only way to promote party unity is for Hillary Clinton to admit that Obama beat her fair and square, that he's a strong candidate who agrees with her on policy, and that she'll work hard to mend fences to help Obama defeat John McCain. I'll be curious to see what she says tonight, but this inability to admit actual defeat is true to form, at least.