Recent attacks in Iraq have shaken Iraqi security gains after a periodof relative calm. The most recent attack, killing 170 people andinjuring hundreds more, coincided with the announcement of a newpresidential election date. Jane Arraf of the Christian Science Monitorand Global Post talks to NewsHour's Gwen Ifill about the mood inBaghdad, Obama's election intervention and from where this new wave ofviolence may be coming.