David Usborne: Obama breaks with convention to get Bill's help
No one knows better than Barack Obama that you dance with Bill Clinton at your peril -- big egos can squash even nimble toes.
He is nonetheless turning to the former president to give him much-needed lift when Democrats meet in Charlotte, North Carolina, in five weeks' time for their party convention. Mr Clinton will usurp the role that would normally be Vice President Joe Biden's and deliver the keynote speech on the penultimate night of the convention. In it, he will formally offer Mr Obama as the nominee.
That the party is giving him star billing is a surprise only in the context of the sometimes tricky Obama-Clinton relationship. Yet the reasons are clear.