That might be because the new suburbs vote GOP and the GOP don't want to piss off their base.
I'm sure that's true, but the votes of the new suburbs count a lot more than other people's votes to begin with, because of higher turnout in the new suburbs.
I live in an old industrial city that had very low turnout in the recent governor election, because the county (run by new suburban types) decided to move the polling place without telling anyone beforehand. So we don't have a whole lot of power down here.
The media is also strongly biased in favor of the politics and passions of the new suburbs (their complaints to the contrary notwithstanding). They don't understand the "other" America where the rest of us live.