A new Wall Street Journal/NBC News poll shows that as Democrats prepare to gather in Denver for their national convention next week, the Obama campaign's biggest challenge may be attracting Sen. Clinton's supporters to his campaign. Only half the people who voted for Sen. Clinton in the primaries said they are now supporting Sen. Obama. One in five is supporting Sen. McCain.

"Whatever momentum Obama took into the summer, he really appears to have lost," said Neil Newhouse, a Republican pollster who conducts The Wall Street Journal/NBC News poll with Democrat Peter D. Hart. "It's as if his campaign has stalled a little bit or coasted."

A very good source is telling me that multiple DNC members have told him that Hillary is the person. While not immediately intuitive, Clinton is the candidate who one can easily imagine helping with Barack Obama's numbers. Which seem to be ... in bad shape? Who else would fundamentally shift the numbers? You could see her bringing Democrats back home, etc., in a way that none of the other candidates could.

By the way, she would probably school most Republican VP candidates in the debates. And she and Bill know how to attack attack attack.