After Iowa, Barack Obama is on a roll and Hillary Clinton is on the ropes Friday, January 4th 2008, 1:48 AM (Cliquer le titre pour voir l'infographie) "What do we do now?" was the question Robert Redford's character asked his handlers after his stunning victory in the 1972 political gem, "The Candidate." It's a question that both Barack Obama and Hillary Clinton will be asking themselves today, though for very different reasons. Obama's smashing victory Thursday night in the Iowa caucuses was more than just history - it was an exclamation point on an improbable quest. The decisive margin anoints him as the clear Democratic front-runner and suddenly, the nomination is within his grasp. If he can capitalize on the moment and sweep New Hampshire next week, he will be in a position to go all the way. Clinton is in trouble, and she knows it. Her flat concession speech, gracious under the circumstances, reflected the devastating facts. Her third-place fin...