Philadelphia - Democrats who gleefully jeered Republican divisions last week awoke to a political mess of their own making Monday as party unity behind Hillary Clinton proved much harder to secure.

Gathering for their convention in Philadelphia, Democrats struggled to shake lingering bitterness among supporters of defeated rival Bernie Sanders and dealt with the aftermath of a leadership shakeup at the top.

The party announced Monday it would kick off its four-day spectacle with speeches from some of its most popular figures. Massachusetts Sen. Elizabeth Warren, a progressive favorite, would deliver the convention keynote. Sanders and first lady Michelle Obama will also take the stage.

The kickoff lineup had long been intended to appeal to the party’s restive liberal wing, but that task has become unexpectedly urgent. A trove of embarrassing leaked emails some said reveal an anti-Sanders bias at the supposedly neutral Democratic National Committee has ripped open some barely-heeled primary wound.... Read More: VIN