Democrats now have about 8,600 more registered voters in Nevada than Republicans, doubling the edge they held in September, according to state election data.
As of October, there were 420,146 registered Democrats and 411,498 registered Republicans out of just over 1 million registered voters.
Democrats make up nearly 41 percent of the electorate, Republicans nearly 40 percent, with the rest nonpartisan or registered with minor parties.
In March, there were 140 more Republicans than Democrats. In April, Democrats gained the lead for the first time, by just over 200 voters.
The trend has continued. Democrats widened their edge every month since then, according to the data from the secretary of state's office.
(Copyright 2007 by The Associated Press. All Rights Reserved.)