Wisconsin voters have until 8 p.m. to cast their Election 2012 ballots, but voting in other key swing states ends as much as three hours before then, and exit polling could provide an early indication of whether President Obama or Mitt Romney wins the White House.
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The earliest key state to watch for is Virginia, where polls close at 6 p.m. Wisconsin time.
Voting ends 30 minutes later in swing states Ohio and North Carolina. At 7 p.m. swing states Florida, Pennslvania and New Hampshire close their polls.
The final two swing states, Nevada and Iowa, close at 9 p.m. CST.