E.J. Dionne argues that President Obama cannot try to repeat his optimistic 2008 campaign if he wants to be re-elected, in his column, “Obama: Can A Messiah Win Twice?”

Four years ago this week, a young and inspirational senator who promised to turn history’s page swept the Iowa caucuses and began his irresistible rise to the White House.

Barack Obama was unlike any candidate the country had seen before. More than a mere politician, he became a cultural icon, “the biggest celebrity in the world,” as a John McCain ad accurately if mischievously described him. He was the object of near adoration among the young, launching what often felt like a religious revival. Artists poured out musical compositions devoted to his victory in a rich variety of forms, from reggae and hip-hop to the Celtic folk song. (My personal favorite: “There’s no one as Irish as Barack O’Bama.”) Electoral contests rarely hold out the possibility of making all things new, but Obama’s supporters in large numbers fervently believed that 2008 was exactly such a campaign.

As the attention of the politically minded has focused on the rather more down-to-earth contests in Iowa and New Hampshire that will help determine which Republican will face Obama in November, let us ponder what the coming year will bring for someone who must now seek re-election as a mere mortal.