John Dickerson on Barack Trouncing Hillary in South Carolina

In SLATE, John Dickerson writes:

What increased the impact of the trouncing is not just that it's a more than 40-point swing from polls in November where Clinton led Obama by 20 points but that the Clinton campaign worked so hard to knock Obama down in the previous week...

Bill Clinton was unleashed across the state taking on Obama and the press, which he upbraided for giving the challenger an easy ride...

Going into primary day, the national press and political class obsessed over whether Obama's victory would be diminished because he performed disproportionally well among African-Americans. Obama did in fact obliterate his opponents among black voters, winning 82 percent of the vote, but he also got a quarter of the white vote. Obama also did well among independents, who made up 23 percent of the primary electorate: He beat Clinton 40 percent to 23 percent, which helps his argument to Democrats voting in future states that he can capture those swing voters in a contest with Republicans in the fall.