Barack Obama has a 58-point lead over John McCain among LGBT voters, according to a recent public opinion poll.

Registered LGBT voters favour Senator Barack Obama over Senator John McCain 68% to 10%, with 3% of LGBT adults supporting Ralph Nader and 1% choosing Bob Barr.

Another 15% of LGBT voters said they were still undecided on a candidate.

The latest Harris Poll, conducted August 1 – 7, surveyed 2,834 U.S. adults online, of whom 178 self-identified as gay, lesbian, bisexual or transgender.

Obama’s lead is critically dependent on his 33 point lead among people under 32, but they are usually are the least likely generation to actually vote.

McCain leads among “Matures,” those over 62, by nine points, the generation that is usually the most likely to vote.

Obama currently wins virtually all the African-American vote (+91) and most of the crucial Hispanic vote (+25) but loses the white vote by eight points.

In the past whites were more likely to vote than blacks or Hispanics.

There is only a modest correlation between income and voting intentions.

Obama leads among all income groups, with a 17-point lead among those with less than $35,000 and six points among those earning $75,000 or more.

Harris Interactive is an American market research company that specializes in public opinion research using both telephone and online surveys.