Barack Obama leads John McCain by 10 points, 51-41, among Colorado voters, according to an Insider Advantage/Poll Position survey released Thursday. Other recent polls of Colorado voters have shown a much closer race.

The Insider Advantage poll surveyed 508 registered voters by telephone Wednesday and has a margin of error of 4.3 percent.

Two other Colorado polls released this week each had McCain up by 2 points, within the margins of error. An American Research Group poll released Wednesday tallied McCain leading 46-44, and a Rasmussen poll released Sunday had McCain ahead 48-46.

Both polls, however, were conducted before a widely publicized swing by Obama through the state Monday and Tuesday, and before the economic turmoil that has changed the focus of the presidential campaign this week.

A National Journal poll poll conducted in Colorado and other swing states, also released Thursday, showed a neck-and-neck 45-44 Obama advantage in the state.

A week ago, the previous Insider Advantage poll showed a slimmer 49-46 Obama lead in Colorado.

Obama holds a commanding lead among all voters under age 65 in the most recent Insider Advantage poll, but trails McCain by 24 points among the oldest voters. Obama also leads by an astounding 60 points among Hispanic voters in the Colorado poll.