UPDATE: Marc Ambinder reports on New Hampshire exit polls:

GOP: 3 in 10 GOP voters are independents ...many late deciders... McCain more electable than Romney...33% say economy is biggest issue followed by Iraq (22%) .... Democrats: 46% made up minds without last week.. 4 in 10 are independents.... HRC's favorability: 73%; Obama's: 84%; ... 36% say economy is top issue....

By mid-afternoon on election day, turnout at the polls here was already approaching historic levels. The combination...