I read this NYT piece, which is interesting, FWIW.
It's worth a read, in any case, for some background. The "Khantroversy" is supposed to be the "gravest crisis" of the campaign.
Ignoring Advice, #DonaldTrump Presses Attack on Khan Family and G.O.P. Leaders https://t.co/vj5IptqYpZ #KhizrKhan #Khan #Islam #Jihad #Dems— Donald Douglas (@AmPowerBlog) August 3, 2016