Liberal Party leaders must take up the cause for ER or we're doomed as far as advancing the case for democracy goes. No one working under the NDP banner will be successful in convincing very many LPC supporters of the need for ER. Democracy is an idea that has to come from within that party itself. At that point we add their numbers to our's, and then we can ice a decent team. Remember, it's all about democracy and not what the NDP can force onto voters supporting other parties. Attempting to coerce them on ER at this point will only antagonize 'em. They have to conjure up the force within.
Summon the force, Liberals. Want it! Ask and you shall receive. ER is an issue not so unlike the gun registry or SSM. ER is a no-brainer.