The federal government recently began its seventh year of considering whether to approve construction of the Keystone XL pipeline. Nearly all that time has passed under the administration of President Obama, who seems content never to decide the pipeline's fate. That way, it wouldn't be built, which would please the president's supporters on the environmental fringe, but would never be explicitly rejected, which could offend everybody else.It's striking to see an administration stonewalling an issue with so much popular support on the other side.