See our recent Monkey Cage post on the Gun Gap
https://www.washingtonpost.com/news/monkey-cage/wp/2017/05/09/gun-ownership-used-to-be-bipartisan-not-anymore/?utm_term=.b6d106700cc4&wpisrc=nl_politics&wpmm=1
and a spin-off
http://hotair.com/archives/2017/05/09/growing-gun-gap-american-politics/