The XL Pipeline, upon its completion would simply be replacing one source of Oil dependency with another. And what Canada makes up for in political friendliness, could be undone by the fact that US oil would be coming from a much smaller number of sources.  Furthermore, resolving US supply problems will not solve the global energy shortage that will arrive as Oil deposits shrink and Chinese demand rises. Oil will remain a source of political instability.  The only true path to energy independence is to find alternative renewable sources that do not leave the United States and the rest of the world dependent on resources that are limited both in amount and in their geographical locations. The XL Pipeline might even undermine these efforts as it will create a false sense of security.