A new automated Survey USA poll conducted for the Las Vegas Review-Journal and 8NewsNow finds President Obama leading Mitt Romney in Nevada by four points, 50 to 46 percent. Obama leads by six among those who say they have already voted, while Romney edges Obama 47 to 46 with voters who plan to vote on Election Day. 

Romney had a narrow lead in Washoe, 48-46, and was beating Obama 49-42 among nonpartisans, according to the poll. Two weeks ago, Romney led Obama 52-34 among independents in a SurveyUSA poll, a double-digit margin he needs to win. Romney's 2-point advantage didn't change in Washoe, where Obama in 2008 became the first Democratic presidential contender to win since Lyndon B. Johnson in 1964.

An NBC/Marist/WSJ poll released last week gave Obama a three point edge in Nevada.