What this indicates to me is that the RNC may already be manipulating circumstances in the background. If they can insert Carson into the fray as a wedge to defeat Trump in Iowa, they then can propel the image that Trump has peaked.
-— If they can insert Carson into the fray -—
There is a big evangelical vote in IA which is a natural constituency for Carson.
Huck and Santorum have done well there in the past.