Remember when it used to be the left slamming "big media" for spreading lies (i.e. Saddam's weapons of mass destruction) and championing alternative sources?  Remember when Julian Assange was as lionized as Edward Snowden? 

Obviously mainstream and alternative news sources are both seriously flawed.  But let's not pretend that the choice to privilege one over isn't often based on whether the source supports our preferred narratives, be they conservative or liberal.