They are pushing him hard, as his constituency of evangelicals and home schoolers will otherwise probably go for Sarah...and they are hoping he will split enough off to knock her out...making room for Romney.
Not going to happen, although he still has a devoted following of huckahillbillies here in Iowa.
I don't think many homeschoolers will vote for Huckabee, when his first and largest donations and endorsements in 2008 came from the teachers unions.