Postmedia speculation: Harper running in "bubble"

Much media attention is focussed on Prime Minister's Harper's decision to take just five questions a day. It may be a sign of how little of substance there is in this campaign that he can get away with that. Postmedia file linked here makes up its own "could-be" answer to the question: It notes the "brewing issue of whether Harper, as the apparent front-runner in the race, is running a campaign in a bubble to prevent embarrassing mistakes." That could certaimly be. Why doesn't someone make that question one of the five?