One other national poll showed Cruz within 5. Cruz does 4 points better against Hillary than Trump does in the RCP average.
I'd pay good money to see a demographic breakdown that substantiates such a result....
I think, given the trend of the most recent polls, that Sen. Cruz is trending upwards pretty much everywhere.
If it continues modestly, he will win Iowa, possibly NH, almost certainly SC, and then proceed to an excellent result to the SEC primary.