The senior senator from Louisiana returned to the Capitol on Thursday not just as a lawmaker but also, in her words, as "a daughter of the Crescent City." The senator, Mary L. Landrieu, whose father was a storied mayor of New Orleans, whose brother is Louisiana's lieutenant governor, who walked her children out of her lakeside home expecting, correctly, that she would never see it again, was back in the Senate chamber, full of passion and rage at President Bush and what she called "the staggering incompetence of the national government." Ms. Landrieu, a Democrat who was nearly put out...