Before Voting Begins, Clinton Leads

Clinton enjoys considerable support from her home state of New York. She has received commitments from 41 of the 49 super delegates there, giving her a solid base before she even leaves the Empire State.

Obama has similar support from his home state of Illinois, securing commitments from 24 of the state's 32 super delegates.

Methodology: ABC News' Political Unit contacted approximately 93 percent of the super delegates by e-mail or telephone.

Some delegates contacted by ABC News had not yet made up their mind on their endorsement and some have no plans to endorse before voting begins.

Super delegates who reported to ABC News that they are firmly committed to a candidate and whose support the campaign is aware of, were added to that candidate's tally.

ABC News also checked and included all explicit public announcements of support made by any super delegate.

We also reached out to the delegate trackers in each campaign to determine whether our count is similar to their count.

Because super delegates are unpledged, they are under no obligation to state their preferences publicly before the convention. Counting super delegates is an inexact science, but this is the best estimate of the current state of play according to the super delegate responses we've received.

DELEGATES

Clinton 158

Obama 89

Edwards 26

Richardson 20

Dodd 15

Biden 8

Kucinich 1

Gravel 0

ABC News' Jacqueline Klingebiel, Nancy Flores and Mike Chesney contributed to this report.