The 2012 campaign season ends Tuesday with nearly $2 billion spent to reach voters.
The campaigns have especially targeted likely voters in the battleground states of Nevada, Colorado, Iowa, Ohio, New Hampshire, Virginia, North Carolina, and Florida.
In Virginia Beach this morning, voters stood in long lines before polling places even opened. Many said they feel their vote is especially significant this year as the state is considered a swing state.
Many also said they're ready for the non-stop TV ads, mailers and phone calls to be over.
What clues should you pay attention to for the Election outcome? Dr. Charles Dunn, distinguished professor of government at Regent University, offers more insight.
The Associated Press is reporting heavy turnout in several storm-ravaged areas in New York and New Jersey. Voters there are expressing relief and even elation at being able to vote at all in the aftermath of Superstorm Sandy.
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Weather may help the turnout across the country. Forecasts predict mild, quiet weather in most places.
Meanwhile, more than 30 million Americans in 34 states and the District of Columbia have already voted. Their ballots will be counted today as well.
The presidential candidates need 270 electoral votes to capture the White House.
Voters will also decide on one-third of the seats in the Senate, 11 governorships, and state ballot proposals ranging from legalizing gay marriage to repealing the death penalty.