Is Barack Obama lazy?

Hillary Clinton used the occasion offered by this waited hearing of general Petraeus to make her point and proove one more time how accomplished, rigourous and hard at work she is.

Barack Obama contented himself with asking several questions to the general, which is, after all, what senators are supposed to do during a hearing, even though they sounded nearly vague.

He may not have taken enough advantage of this opportunity. Did he study this record before?