Liveblogging Bill Clinton's ringing endorsement of Barack Obama.

(From Guardian Unlimited)

DENVER Pepsi time again, and what could be one of the most amusing and/or awkward moments of the convention. A few hours ago, many of the delegates here were openly weeping as Hillary Clinton moved to award the presidential nomination by acclamation to Barack Obama. But now it's cranky ex-presidential uncle and erstwhile Democratic party hero Bill Clinton's turn to speak. It's not a given that he'll play by the rules, and this has the Obama campaign worried. Bad blood remains from the primary fight, and we know that he didn't much fancy speaking on tonight's theme, Securing America's Future - he wanted to talk about the economy , and particularly about the achievements of his own administration, which he feels Obama maligned. Then there was the "hypothetical scenario" he outlined this week, involving a "candidate X" who can't deliver, and a …