I am thinking it is pretty much over, by this map:
http://www.google.com/elections/ed/us/results/2012/gop-primary/ks
I’ve been following that map very closely. Provided that the rest of the outstanding counties more than counteract Kansas City, but do not do so enough to push Romney below 20%, I think that Santorum may end up with 19 of the at-large delegates, and Romney with 6, as well as all 12 of those allocated by CD. The other outcome with Romney above 20% would be 18 and 7.