I’m not sure on the actual workings of the Corps of Engineers thing. Trump may or may not been able to change anything. I think he should order a review of it all, and if everything was done on the up-and-up with environmental reviews, land ownership, etc., the pipeline should be build.
Just because some Indians that refused to be in on the process are pissed, or the activists that thought this would be a cool thing to protest isn’t a reason to shut down the pipeline.
A new route to complete this little bit of pipeline will take years and years with new environmental and historical studies, permitting, etc. (Which have already been done on the existing route).
If I was a cartoonist I would have the first panel with George Bush standing on the rubble pile saying “And the people that did this will hear from all of us very soon!”
The next one is obama, facing a half-dozen teepees blocking the road waving a white-flag saying “We give up!”