Liberals are antsy. They haven't seen Democratic voter enthusiasm like this in a long time and they'd rather not wait until the party's August convention to harness it to the party's presidential nominee.
Activists who gathered at a Washington hotel this week said Obama and Clinton have energized the electorate with their prolonged contest, but several warned that a convention fight could be fractious and leave little time to mount a general election campaign against Republican nominee-in-waiting John McCain. - Newsweek
I think there ought to be a Republican two man race -- Ron Paul anyone?