The last ballots in the presidential election were cast more than two weeks ago. But votes in 37 states, and the District of Columbia, are still being counted, with the results yet to be officially certified. President Obama’s national margin over Mitt Romney has increased as additional ballots have been added to the tally. According to the terrific spreadsheet maintained by David Wasserman of the Cook Political Report, Mr. Obama now leads Mr. Romney by 3.3 percentage points nationally, up from 2.5 percentage points in the count just after the election. Turnout has grown to about 127 million voters, down from roughly 131 million in 2008. The gap could close further as additional ballots are counted. The newly counted ballots have also shifted the relative order of the states. Immediately after the election, it appeared that Colorado was what we called the “tipping-point state”: the one that gave Mr. Obama his decisive 270th electoral vote once you sort the states in order of most Democratic to least Democratic. Mr. Obama’s margin in Colorado has expanded to 5.5 percentage points from 4.7 percentage points as more ballots have been counted, however. He now leads there by a wider margin than in Pennsylvania, where his margin is 5.0 percentage points. Neither state has certified its results, so the order could flip again, but if the results hold, then Pennsylvania, not Colorado, will have been the tipping-point state in the election. Does this suggest that Mr. Romney’s campaign was smart to invest resources in Pennsylvania in the closing days of the campaign?

The last ballots in the presidential election were cast more than two weeks ago. But votes in 37 states, and the District of Columbia, are still being counted, with the results yet to be officially certified.President Obama’s national margin over Mitt Romney has increased as additional ballots have been added to the tally. According to the terrific spreadsheet maintained by David Wasserman of the Cook Political Report, Mr. Obama now leads Mr. Romney by 3.3 percentage points nationally, up from 2.5 percentage points in the count just after the election.Turnout has grown to about 127 million voters, down from roughly 131 million in 2008. The gap could close further as additional ballots are counted. The newly counted ballots have also shifted the relative order of the states.Immediately after the election, it appeared that Colorado was what we called the “tipping-point state”: the one that gave Mr. Obama his decisive 270th electoral vote once you sort the states in order of most Democratic to least Democratic.Mr. Obama’s margin in Colorado has expanded to 5.5 percentage points from 4.7 percentage points as more ballots have been counted, however. He now leads there by a wider margin than in Pennsylvania, where his margin is 5.0 percentage points. Neither state has certified its results, so the order could flip again, but if the results hold, then Pennsylvania, not Colorado, will have been the tipping-point state in the election.Does this suggest that Mr. Romney’s campaign was smart to invest resources in Pennsylvania in the closing days of the campaign?