The Republican Governors Association appears to be abandoning Colorado, according to RGA Chair Haley Barbour (via ColoradoPols):

Will the RGA stand by [Republican candidate Dan] Maes with financial support?
“We have put some money in Colorado,” Barbour told reporters during a breakfast hosted by the Christian Science Monitor.
He added firmly, “We have put some money in Colorado. Past tense.”

Nate Strauch, communications director for the Maes campaign, told Battle ‘10:

“Dan’s campaign cannot coordinate directly with the RGA’s financial arm, but his position from the beginning has been to continue campaigning hard here in the state, without necessarily expecting any help from outside Colorado. That’s how he won the primary and how he plans to win the general election.”

Maes raised approximately $50,000 in August, about a quarter of what former Republican and current American Constitution Party candidate Tom Tancredo drew in same time period. Denver Mayor and Democratic nominee John Hickenlooper outraised both of his competitors combined, raking in over $400,000 last month alone. Hickenlooper did not face a primary challenge.