With a KMX green light the federal Liberals have decided to calve off the hard core anti-Canadian oil fringe of their supporters in favor of the moderate majority in B.C. and elsewhere.  

Those finding themselves outside the big red tent will have few choices.  Shifting their votes to the NDP or the Greens would likely end up helping the Conservatives.

As for Beech he could resign from the Liberal caucus.  Or he could try to explain to some of his more anti-Canadian oil constituents that just like the people in Alberta who wanted the now defunct Northern Gateway pipeline you don't always get what you want everytime.