Rodney Frelinghuysen

The Keystone pipeline is one of those things that's sort of a political driver. And mostly, the Republicans use it to sort of embarrass the president and embarrass quite a few Democrats who feel that there's a potential for an environmental disaster.

By irreducibly complex I mean a single system composed of several well-matched, interacting parts that contribute to the basic function, wherein the removal of any one of the parts causes the system to effectively cease functioning.