Since 1972, a majority of Republicans have supported a law that would require a police permit for a gun purchase.The original version of this required police permission to acquire a pistol with qualifications including "good reason" and "good character." These laws lingered on the books into the 1960s and were widely understood to mean that people of color would NOT get any kind of permit at all, as they were commonly thought to be lacking in the character department, and their idea of good cause would result in creating a hostile work environment for the boys in the white sheets.
My favorite charts are the ones showing "Simulated probability of support" against political orientation. It is widely known that a good Power Point presentation with lots of charts and graphs is the definition of irrefutable evidence so I guess that's settled, at least in the WaPo building.
As an afterthought, I'm hearing that the Vegas shooter also owned 2 airplanes. Think what he could have done by putting a couple of small bombs in the back seats of a Cessna 172 and crashing it into the crowd.