Obama may need to calm Dem divides at Clinton convention

Hillary Clinton was booed repeatedly on the convention floor by supporters of Sanders who felt burned by the Democratic National Convention. The spectacle destroyed her campaign's plan for a perfectly choreographed convention, and that's why Obama speech to conventioneers is suddenly more important.
"Obama might end up being the most important surrogate for Clinton this week and throughout the campaign," Democratic operative Rodell Mollineau told the Washington Examiner. "He will be able to mend some of wounds that might still be festering between the hardcore progressives and more mainstream Democrats."
Clinton supporters are hoping that's the case.