As I understand it, most state primaries have a viability threshold of a certain percentage of the popular vote - 15% in most states - below which the candidate receives no delegates. This would seem to imply that it is theoretically possible for no candidate to meet the threshold if there are 7 or more candidates; as is currently the case for the Democrats.
Is my understanding correct, and is there any contingency clause in place for the unlikely event that this occurs? Would the state just not be represented by any delegates in the national convention?