The libs have been trying to shut down this pipeline since... well, forever.
It is protected by treaty, not a fake one, but a real one.
The libs love canada, and shutting down this pipeline in violation of a treaty with them would piss off the canadians.
My guess is alot of noise will be made, but the pipeline will remain open.
Warren Buffett prefers oil to be moved by his RR, not a safer, cheaper pipeline.