What to watch for as the presidential results come in
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Wondering what to look for as the presidential results start to roll in tonight? We've made it easy: Below, check out CBSNews.com's guide to when the polls close in key states and what the results will tell you about how the election seems to be breaking.
In states where the race is not close, CBS News and other media outlets will be able to call the state at poll closing based on exit polls. In tighter states - and most, if not all, of the battlegrounds will fall into this category - there won't be a call at the close. But CBS News will be able to talk about the exit polls and potentially discuss which candidate appears to have an advantage; we will also be able to break down the returns that have come in and what they tell us.
CBS News will be on air with coverage starting at 7 p.m. Eastern Time, and CBSNews.com will provide continuous coverage throughout the day and into night.
7:00 p.m. ET
Polls close in six states - but Virginia is the one to watch.
13 electoral votes
2008: Obama won by 6.3 percent
2004: Bush won 8.2 percent
Thanks to a population boom in Democratic-leaning Northern Virginia and an influx of minority voters, President Obama turned the Old Dominion State blue four years ago for the first time since 1964. Polls show the state to be exceedingly tight this time around. Mitt Romney, who enters Election Day with a narrower path to the 270 votes necessary for victory, will see that potential path shrink even further if he falls short here. This is a state that counts votes quickly, and should provide an early window into how election night is going.
Election night: When will we know the winner?
7:30 p.m. ET
Polls close in three states - including two battlegrounds, Ohio and North Carolina.
18 electoral votes
2008: Obama won by 4.6 percent
2004: Bush won by 2.1 percent
The Buckeye State has been the biggest battleground of the 2012 campaign. Both candidates have made more campaign stops here than anywhere else, and with good reason: It is the lynchpin of Mr. Obama's attempt to build a firewall in the Midwest to ensure victory in case he falls short elsewhere. If Mr. Obama wins here and in Wisconsin to the north - as well as Pennsylvania and the other states he is expected to win - he'll be just a few votes short of 270 with plenty of battlegrounds outstanding.
Early votes are reported first after poll closing, and they are expected to show strong support for the president, because the bulk of the early votes were cast in urban centers. In addition, the first round of Election Day results are expected to come in from Democrat-leaning high population density counties near urban centers. if the race is tight in Ohio and the state turns out to be decisive, it will be weeks before we have a winner as the campaigns fight over provisional ballots.
15 electoral votes
2008: Obama won by 0.3 percent
2004: Bush won by 2.9 percent
A must win for Romney, if only because it is the one battleground state where he held a clear lead entering Election Day. If Romney loses here, he's almost certain to have a very bad night. Though the Obama campaign has insisted it has not given up on North Carolina, where young and minority voters drove the president to a surprise victory four years ago, Mr. Obama's decision not to campaign here since the Democratic National Convention in early September -- which was held in Charlotte -- tells a different story.
8:00 p.m. ET
Polls close in 15 states and the District of Columbia - including in Florida, Pennsylvania and New Hampshire.
29 electoral votes
2008: Obama won by 2.8 percent
2004: Bush won 5.0 percent
This is the battleground behemoth, and if Romney loses here, he's in deep trouble. (Mr. Obama entered Election Day virtually guaranteed to win 237 electoral votes; winning Florida would put him at 266, just four short of victory.) The polls here have been tight, though Romney may have a small advantage; it's no surprise that the GOP nominee stumped in Orlando Monday. One wildcard: A nor'easter storm is expected to hit the state on Election Day, potentially depressing turnout.
Most locations actually close in the Sunshine State at 7 p.m. Eastern Time, but there are some locations in the Florida Panhandle that are in the Central Time zone, and thus close an hour later. Media outlets do not release exit poll information or early returns until all the polls close.
A big lead here for Romney after the close will not tell the story: Many Democratic strongholds here tend to report results later than the rest of the state.
Americans head to the polls to vote
4 electoral votes
2008: Obama won by 9.6 percent
2004: Kerry won by 1.4 percent
Florida is the biggest battleground; New Hampshire is the smallest. But that does not mean it hasn't been strongly contested: Both candidates have campaigned here in the campaign's final days, in part because unlike in some early voting states, CBS News estimates that only about 10 percent of voters here will have cast ballots before Election Day. New Hampshire is also perhaps the quintessential swing state - the only place where President George W. Bush won in 2000 but lost in 2004. In a tight race it could all come down to the Granite State, which happens to be where Romney has a summer home.
20 electoral votes
2008: Obama won by 10.3 percent
2004: Kerry won by 2.2 percent
The state that could blow the electoral map wide open. For most of the campaign, Romney largely ignored Pennsylvania under the assumption it was out of his reach. But driven by recent polls that showed the state within striking distance, Romney and the outside groups supporting him invested in the state - and the candidate himself used his precious campaign time to campaign here on the final weekend. If Romney can steal a victory here, his odds of victory will improve dramatically; keep an eye on turnout in and around Philadelphia, which drove Mr. Obama's ten-point win here four years ago.
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