For those of us who have discussed Kasich, I follow him on Facebook and he's been touring the country promoting the Balanced Budget Amendment and just yesterday (I think?) North Dakota ratified it to be state #27.
It's possible that he's quietly setting himself up behind the scenes with establishment support to come out of nowhere if an opening for him comes up, with a Balanced Budget Amendment being a centerpiece of his campaign (and the moment he jumps in, he'll have an extremely convincing argument for conservatives that would blunt attacks on more moderate initiatives in his record, and the momentum and attention could lead to more states rapidly ratifying it, which could lead to a reinforcing cycle of conservative credentials, a constitutional amendment, primary wins, etc.) He's also been touring Ohio, touting his economic record and he is very, very popular.
Of course, that's all wishful thinking on my part
Just thought I'd share