Democrats united in Denver? The eyes of the world will be on Hillary Clinton as she delivers a primetime speech to the party convention. The former first lady has urged her supporters to swing in to line behind Barack Obama, the man who beat her in the partys primary season.

But not all of Clintons backers are ready to heed her calls. Some fringe groups even want to push the Democratic nomination for president to a vote on the convention floor. Many Clinton backers are angry too that their preferred candidate wasn't offered the chance to be Obama's running mate.

And two polls released in the last week show that one in 5 voters who plumped for Clinton in the primaries will switch to Republican candidate John McCain in November rather than vote for Obama.

The Clinton couple have secured star billing at the convention on successive days. The Democrats are hoping for a convention boost but know that, in the past, fractious conventions have all but scuppered the hopes of presidential candidates from both sides of the political fence.

Joining David Crossan in the studio to discuss all the issues are Brian A. Lang, of Young Democrats Abroad, France whose Clintonian credentials are as follows:  Clinton for President, New York, 1992; Transition Team, Little Rock, 1992; and Presidential Inaugural Committee, 1993, along with Crystal Fleming, doctoral student in sociology at Harvard university and a member of Democrats Abroad in Paris.

To view the face-off, please click "play video".