timorg02 is correct in posting that the decision to build the pipeline has already been made. In fact, I saw this as a done deal a couple of years ago. Obama and all American presidents and governments work for various forms of capital, not people.
Dittohead not! is also correct in pointing out that Obama is stuck between his environmental and labor constituencies, and so this politically problematic pro-pipeline decision that he has already made, when announced, will be a political disaster for the Dems.
So Obama has successfully avoided having his political chickens coming home to roost in the mid-terms, but has guaranteed a disaster for the Dems in 2016.
On the pipeline itself, the major concern is not the oil that it will inevitably leak, as pipelines do, but the gravely increased amount of CO2, etc., that will be released into our degraded atmosphere, and, most of all, the ironclad commitment to fossil fuels and the attendant destruction of humanity it represents.
I hate racism with a passion, but Obama is astonishingly conservative as well as politically incompetent. I'm afraid that an accurate assessment of him will conclude that he has been one of the worst, most hapless presidents in American history. Mr. Natural