They want to build him for this reason: Huntsman is not a religious candidate. His views on climate change and evolution and gay rights make him someone that the media wants to root for.
Gary Johnson:
Believes in evolution
Believes in climate change
Is gay-friendly
Was a 2-term governor
Why won't the media cover him (he's living off scraps right now while Huntsman is wasting his large amount of coverage)?
Gary Johnson hasn't been in any public office since January of 2003 when he left office. Plus he wants to end the war on drugs that doesn't get him too fuzzy with the establishment.