In the Nevada election on Tuesday, voters will cast ballots in the presidential race between Barack Obama and Mitt Romney, as well as in the contest for U.S. Senate between Republican incumbent Dean Heller and Democratic hopeful Shelley Berkley.
Berkley pulling off an upset win would mark a significant pick-up for Democrats in the upper congressional chamber. Heller was appointed by Nevada Gov. Brian Sandoval (R) as the interim replacement for the seat previously held by former GOP Sen. John Ensign, who resigned amid the fallout from a sex scandal last year.
The polls in Nevada are open between 7:00 a.m. and 7:00 p.m. Pacific time.
Below, a rundown on the latest presidential poll numbers in key swing states. Scroll down for live blog updates on the latest developments to unfold on Election Day.