It's actually not that hard to get a gun here if you want one, just takes time and money. That discourages the crazies though.

I think John Oliver nailed it. People who want guns are more committed than those who want to ban them. They mobilise for every piece of legislation in a way that gun control supporters don't.

It's a big reason for Sanders looking like a mirage to me. Making progress on issues is a grind. Look at how the GOP is wearing down Roe v Wade. Democrats don't have the same single mindedness on their issues.