Is it really?
Just to present the full picture…
You have the pledged delegates, who are honor- but not legally-bound to vote for their candidate on the first ballot. I’m presuming that they will do so without significant defections. The superdelegates can make up their own minds and at any time, but many of them have already endorsed one candidate or the other. I presume that those who have already declared their choice won’t change their mind.
Now, a quick look at the numbers, taken from DemConWatch.
Of the 2826 pledged delegate slots decided upon, 1490(52.7%) will be awarded to Obama, and 1336(47.3%) to Clinton. To secure a majority among PDs, she needs 71.3% of the remaining 408 PD slots still unassigned. The highest prevalence of delegates she has ever achieved in a state has been 77% in Arkansas. Next highest is 60% in New York. So, she’ll have to secure and maintain an average higher than she has achieved in all but 1 of the 42 contests to date. So, it seems to me that Clinton is very unlikely to get a majority of pledged delegates. Speculatively, let me grant her 53% (i.e. Obama’s performance to date) of the remaining delegates. That means that Obama will end up with 1682 PDs and Clinton with 1552 PDs after the last state contest.
Of the 794 superdelegates, 495 have declared their support for a candidate. 237 for Obama, and 258 for Clinton. Clinton will need 214 i.e. 71.5% of the remaining 299 SDs to secure 2024 total delegates, in order to barely become the nominee. She currently has support of 52% of the declared SDs, and the latest date at which she enjoyed the required level of support among SDs was 13th January. Since then, her share of SDs has monotonically decreased. Conversely, even after getting 47% of the remaining PDs, Obama will need just 28.6% of the undeclared SDs to barely get the nomination.
Sorry, but I don’t see how the race is “neck & neck”, unless you treat all superdelegates as unknown, despite their declarations. Even then, she needs almost 60% of the SDs. Yes, in terms of absolute numbers, the margin is small compared to the total number of delegates, but given the proportional nature of the delegate assignment, the existing SD support, and the evolution of this nomination process so far, it’s not “close”.