Will the Democratic primary race finally come to an end next week? Marc Ambinder offers a glimmer of hope:

Neither the Clinton nor the Obama campaign is clear what the DNC's rules and bylaws committee will do on May 31; depending upon how or whether they re-allocate delegates, Obama could wind up within to 20 to 30 votes of the nomination -- a situation rectifiable by a piddling performance in Puerto RIco, South Dakota and Montana -- or more than 100 delegates short, requiring solid performances in those states plus a few dozen superdelegate endorsements to put him over the top.

To prepare for that eventuality, the Obama campaign has, for the first time, really, begun to bank delegates. Sources close to the campaign estimate that as many as three dozen Democratic superdelegates have privately pledged to announce their support for Obama on June 4 or 5. The campaign is determined that Obama not end the first week in June without securing the support of delegates numbering 2026 -- or 2210, as the case may be.

--Christopher Orr