Dream ticket? Dream on.
Democratic insiders say Hillary Clinton and Barack Obama once held warm feelings for each other, but their fierce White House fight is pushing their relationship to the point of no return.
Many say it's already gone so far that any sort of union would come only if they thought the good of the party absolutely depended on it. Clinton has floated the idea of a dream ticket. But if Obama wins, the chances of it happening are nearly zero, strategists say.