Mitt’s not a gun guy. Period.
Doesn’t own one, isn’t interested, were nothing in his life.
Temperamentally he’s an establishment son, more comfortable at a Harvard alumni smoker than a VFW.
He has and does support Massachusetts draconian gun laws.
I very much doubt that he is comfortable with what I consider what the rubber meets the road definition of the 2nd is about. The violent, killing opposition to government.
That's mostly true, except MA's gun laws aren't 'draconian,' they just are worse than most states, and Mitt did what he could to make them less draconian. And I think he doesn't want to spend anymore time at a Harvard Alumni event than at a VFW - he'd much rather just be with his wife or family doing a Mormon Family Home Evening and eating jello.
Given his record and those whom he has advising him on the issue, he will likely be the most 'plugged in' president on the 2nd amendment ever elected.
Besides, if he ever did articulate that he understsood the 2nd amendment as "The violent, killing opposition to government", his campaign would be over.