It doesn't matter, the media is going with the narrative that Hillary is vulnerable for whatever reason. She'll win regardless, and if she's attacked from the left it will only help her in the general election, assuming Obama remains unpopular.
Yeah, they're not all concerned with facts, just their narrative. They want to stop the "boring" Hillary romp and will try their best to do so.
The fact that 2016 isn't 2008 works both ways. Sure, she's better positioned that she was in 2008, but that doesn't mean her level of support in Iowa will only rise, like it did in 2008.
But she doesn't need her support to rise. She's already cracking 60. 2008 is basically the ONLY possible thing the pundits can point to to "prove" Hillary is vulnerable, yet that comparison kind of falls apart when she goes from
trailing Edwards in December 2006 to leading by
50 points in December 2014.