I don't think any of them are stupid enough to try door to door confiscation and a total gun ban at this point in time. It is logistically impossible in this country. There are 100+ MILLION gun owners in America and over 320 MILLION privately owned firearms. Although most people are pussies these days and would roll over for anyone, the end result would be gun battles in people's yards all over the country, lots of dead citizens, a metric sh*t ton of dead blue helmets or whoever else is stupid enough to try it, and would probably end without either side gaining anything. No, these people are not stupid enough to try that (at least not all of them). It is so much easier to influence some taxes here, regulate some commodities there, create some additional international trade regulations, etc which ultimately leads to less and less ammo availability, sky-rocketing prices, and the supply eventually drying up. Maybe after one or a few decades of easing into this, they can keep whittling away at our 2nd amendment rights in other ways, and one day the ban and confiscation may be a possibility. Remember, incrementalism is easier to go along with and harder to see since it's not so blatant and in your face. This is precisely the reason why we can no longer compromise. We have compromised for over 200yrs, and we have to draw the line somewhere.
Basically your frog in the pot scenerio.
Put him in a pot of hot water, it's gonna jump right out. Put it in a pot of cold and slowly turn up the burners and next thing you know, you've bayou dining.