The aggregate of Colorado polls put Obama slightly ahead of Romney 48.8% to 47.3%, or an advantage of 1.5 percentage points.
Colorado Republicans overwhelmingly favored the Republican nominee during the 2008 GOP primary, but Romney surrendered the state in a shocking upset to Rick Santorum in 2012.
The governor shook off his primary defeat and has maintained a close race in Colorado; he took a slight lead for a couple of weeks in October. Again, this state is a toss-up.
Another dead heat can be found in
, where Obama leads by a miniscule 0.3 percentage points. An average of polls shows Obama up 48% to 47.7% in the state won by Obama with more than six percentage points against John McCain in 2008.
A Republican source in Virginia told
a week ahead of the election that Obama had not been polling strongly in the state, which the source said did not bode well for an incumbent president. The source said Romney wasn't necessarily surging in Virginia, but said it's not a good sign for a president if voters are not showing a commitment to the incumbent by the last days of the election.
Again, this is a toss-up state that could decide the election.
The 2000 election in
branded the state for a generation of voters as a notorious battleground state.
George W. Bush carried the state in 2000 by just 537 votes, and carried the state by a wider five percentage-point margin in 2004. Obama won Florida by nearly three percentage points in 2008, but the Great Recession and the devastating housing collapse have left Florida voters in one of the most economically troubled regions of the country.
Romney has held a lead in Florida poll averages since the beginning of October, and he currently leads Obama 49.7% to 48.2%, or 1.5 percentage points.
Losing Florida would cripple the Romney campaign on Tuesday night, but a victory would keep it competitive. The campaign likely is aware that the state is a necessity to beat Obama, and Romney's first trip after Hurricane Sandy forced a pause in campaigning was a three-stop swing through the south, central and north sections of Florida.