Inconvenient to your proposition, Redheat, at least from my point of view, is that overall primary voter turnout this cycle is among the lowest on record. Interesting to note is that Democratic primary turnout has lagged behind Republican turnout in several states, even the likes of touted Democratic stronghold
New Jersey. In states holding primaries for both parties,
The FEC shows overall Democratic turnout, as percentage-of-registered-voters-by-party-affiliation almost uniformly has been tracking behind Republican turnout as compared to previous primaries. A number of Mainstream news articles have noted this. Given that it is not unusual for a state party, as an economic consideration, to not hold a primary when that party's candidate is an incumbent without inter-party challenge ... why undertake the expense to present a contest in which the outcome is a foregone conclusion ... it is clear the reason for cancelled Republican primaries is simply lack of reason to hold a primary.