However, Beauprez has a substantial lead over Hickenlooper among independent voters — 45 percent to the governor’s 37 percent.
The Rasmussen Reports poll comes just days after Beauprez won the Republican primary with 30 percent of the vote in a crowded field.
Among their own party, Hickenlooper carried 84 percent of Democratic support while Beauprez drew 83 percent of the support among Republicans.
The close polling numbers prompted Beauprez to issue a fundraising letter to supporters calling the results “extraordinary.”
“John Hickenlooper has had the opportunity to make decisions that would empower Coloradans, but instead he caved to liberal special interest groups. Under his watch, Colorado has fallen from the number two state in economic opportunity to number 22,” Beauprez said.
“Quite simply, if he won’t lead, I will,” Beauprez said.
In the U.S. Senate race, a separate poll by Rasmussen also showed Republican Rep. Cory Gardner with a significant lead over incumbent Democrat Mark Udall among independent voters.
Gardner had a five percent lead, 41 percent to 36 percent, with non-affiliated voters, said the polls of 750 likely Colorado voters conducted June 25 through 26.
The numbers shows Udall is running a tight race with Gardner overall, remaining just one percentage point ahead of the Republican among all those polled, 43 percent to 42 percent.
However, Udall’s own fundraising letters say he is running behind Gardner in other polls, including a National Public Radio poll last week that showed Republicans leading Democrats by three points in Colorado.
Another recent poll conducted by the National Mining Association on June 12 showed Gardner leading Udall 47 to 45 percent.
In the governor’s race, Rasmussen Reports said Hickenlooper is considered vulnerable in part because of his support for controversial gun control measures he signed into law last year.
Hickenlooper recently apologized for signing the legislation, which led to the recalls of two Democratic state senators.
“It’s no surprise this race tightened up as soon as there was a single strong Republican as a counterpoint to Hickenlooper,” said Kelly Maher, executive director of Compass Colorado.
“John Hickenlooper has never suffered the scrutiny of a one-on-one race, and now he is going to have to answer to Coloradans for his utter inability to lead. Showering with his clothes on is not going to cut it this time around,” Maher said.
The number of Colorado voters who support stricter gun control laws also shrunk from 42 percent to 38 percent, while 56 percent said they opposed increased gun control.
Rasmussen indicated Udall’s polling numbers are related to his support for Obamacare and his opposition to the Keystone XL pipeline.
Udall’s unfavorable ratings were 29 percent compared to Gardner’s 25 percent, however Udall’s very favorable ratings were 22 percent, compared to 19 percent for Gardner.