be careful with pipeline politics. they're tricky. and, sometimes don't make sense on first glance.

keystone, for example. it was good that it got blocked. but, did the state department really want to help canadian oil get to market in china?

when it was considering exports of it's own?

a number of things just happened.

1) canada approved some pipelines. one of them increasing capacity to cushing.
2) opec cut supply (thereby increasing prices).

again: it's always nice to see a pipeline halted. just, be careful about understanding why. it might not be what you think.