The national League of Conservation Voters has mixed feelings about Colorado’s U.S. Senate members, as in loving Michael Bennet, but Cory Gardner? Not so much.

The left-leaning organization is running ads on Facebook to praise Bennet, the Democrat from Denver, for opposing drilling in the Arctic National Wildlife Refuge. In another it asks Coloradans to put pressure on Gardner to do the same.

Republicans such as Gardner, who hails from Yuma, are backing a GOP budget that the left-leaning environmental organization deems a “shameful effort to sell out the iconic landscape to polluters.”

The league also thanked Democratic Sens. Maria Cantwell of Washington and Ed Markey of Massachusetts, who worked with Bennet last week in a failed attempt to remove the drilling language from the budget bill.

Bennet’s resolution failed 52-48. Gardner voted against it.

Drilling in the refuge is one of the ways Republicans hope to cover the cost of their proposed tax cuts.

“Voting to open up the Arctic Refuge for drilling after a mere two minutes of debate is an embarrassment to this institution,” Bennet said last week after his amendment failed. “For nearly 40 years, there has been bipartisan consensus not to drill in this land that is sacred to tribes and important to wildlife.

“Today, Senate Republicans turned their backs on that legacy with a legislative sleight-of-hand that is nothing more than a political stunt masquerading as an energy plan. It made no sense to drill in the Arctic years ago, when oil was more expensive, domestic production was lower, and foreign imports were higher. And it makes even less sense today, when the United States is exporting oil, supplies are at historic highs, and oil prices are at long-term lows.”

The league said it plans to spend $200,000 spreading the message about its legislative friends and enemies in the campaign.

“The Republican leadership has their math wrong – drilling in the iconic Arctic Refuge may pad polluter profits but it wouldn’t reduce the deficit,” Gene Karpinski, president of the League of Conservation Voters, said in a statement. “We will continue to work with our champions in Congress to stop this ridiculous plan in its tracks. It’s time for members like Sen. Cory Gardner to reverse course and side with people over their industry friends.”