The thing is, Newt is waiting far too long to get in. All the money and endorsements will be gone come October. The nomination will be won by February! That's the price of a system where all the states try to move their primaries as close to the first of the year as possible. Newt is smart enough to understand this, so he's basically saying, "I wanna be kingmaker!" and probably angling for a job in a future administration.
If Hillary is the Dem. nominee, I think Newt could still pull ahead of her because of the FEAR Hitlery would put in people. It would be like a fight for our lives.