He has a pro rail agenda because Buffet is his buddy.
If he starts reopening closed main lines, I might think (for a second) that he’s pro-rail . . . but then I’ll take a second look and say he’s really pro-crony (and pro-whomever’s getting the crude at the other end).
0bama may be using Buffet as a way to not make the decision on the pipeline. If he approves it the enviros are ticked but with transporting by rail and trucks it keeps the enviros and unions somewhat satisfied.