DENVER (AP) -- About 56 percent of respondents in the Denver-Boulder area said they favored Obama, compared with 36 percent for McCain. In Western Colorado, 54 percent of those surveyed supported McCain compared with 40 percent for Obama.

The university's polling institute surveyed 1,060 likely voters statewide by telephone from Aug. 15 to Aug. 21. The margin of error was plus or minus 3 percentage points.

The results were similar to a poll conducted by Quinnipiac in July. In that survey, McCain was favored by 46 percent and Obama by 44 percent among likely Colorado voters. The margin of error was plus or minus 2.6 percentage points.

The Democratic National Convention gets under way Monday in Denver.