On the page with moderator candidates nomination it is possible to leave a comment for a candidate. In some cases, quite relevant questions have been asked in the comments and there have been no response from the said candidate. (Of course, they might have decided that there is no need to respond.)
I would like to know whether the candidate receives some kind of notification about comment under their notification post.
(I agree that candidates probably should check at least occasionally whether there are some new comments. On the other hand, I don't want to them to check obsessively the nominations page and every election-related discussion on meta and in chat twice in a hour. I think they have better things to do - I think that running for a moderator can be time-consuming enough already without that. For example, writing good answers for the questions from the questionnaire will definitely take soemt ime.)