President Obama chose environmental activists over labor unions in his Good Friday decision to delay the Keystone XL pipeline again. This has left unions, long considered staunch supporters, and on whose support he relied to win two elections, fed up.

According to Terry O’Sullivan, leader of the Laborers’ International Union that represents a half-million construction workers:

This is once again politics at its worst. In another gutless move, the Administration is delaying a finding on whether the pipeline is in the national interest based on months-old litigation in Nebraska regarding a state level challenge to a state process—and which has nothing to with the national interest. They waited until Good Friday, believing no one would be paying attention. The only surprise is they didn’t wait to do it in the dark of night.

The Keystone decision epitomizes the tensions between Obama’s two big bases of support – labor and environmentalists, who share little in common besides their support for the President. In fact, environmentalists see labor as a major impediment to advancing their radical agenda of a 100 percent clean energy economy. The Sierra Club even has a confidential union messaging guide that seeks to trick union workers into giving up their jobs. “Don’t ever use the phrase ‘killing’ to refer to jobs, businesses, or the coal industry,” the guide warns. “Talk about transitions, phases, and gradual changes in the way we create and distribute energy.”

Of course killing jobs is part and parcel of big green’s agenda. (A fact that this secret document tacitly admits.) Its goals of ending mining and energy exploration and moving to an economy focused solely on wind and solar threatens more than half a million American jobs in the coal industry alone. And the latest punt on Keystone has kept thousands more from being created, leaving labor unions feeling betrayed by an Administration that promised to fight for them. O’Sullivan continued:

It’s not the oil that’s dirty, it’s the politics. Once again, the Administration is making a political calculation instead of doing what is right for the country. This certainly is no example of profiles in courage. It’s clear the Administration needs to grow a set of antlers, or perhaps take a lesson from Popeye and eat some spinach.

This is another low blow to the working men and women of our country for whom the Keystone XL Pipeline is a lifeline to good jobs and energy security