John Edwards says the aftermath of Hurricane Katrina underscores the "two Americas" theme of his presidential campaign last year. "We see the poor and working class of New Orleans who don't own a car and couldn't evacuate to hotels or families far from the target of Katrina," Edwards said in e-mail messages to supporters Friday "We see the suffering of families who lived from paycheck to paycheck and who followed the advice of officials and went to shelters at the Civic Center or the Superdome or stayed home to protect their possessions." Edwards added, "We have been too slow to...