Unless Hillary is comfortably leading by like 5-10 points she is not going to contest any Romney states outside of NC. Her focus is going to be holding the Obama states you only expand the map if your in a comfortable position but polls show her struggling in states like IA, CO you can forget about trying to pick up GA, AZ, AR etc.
Are people here still gullible to actually believe that Hillary Clinton would win the 2016 presidential election with a map showing a failure to hold Colorado yet win a Democratic pickup of North Carolina? There was a spread in the margins of 7.40 percentage points between those two states. If she's winning the 2016 election with including a Democratic pickup of North Carolina, there will no concern with Colorado and there certainly wouldn't be a concern with Iowa.
Don't worry. After Obama decides to legalize millions of undocumented immigrants come November/December, Colorado will rapidly tilt back to Democratic home turf once again. All Hillary needs to do in return, is probably just to start campaigning there.