I'd do it now too. Surprisingly we haven't seen the major panic buying yet, but it will probably happen next month.
I am not predicting anything major at the outset. There is still a decent chance for Trump, especially if democrats get complacent and have low turn out. Even with all of the s___ they have thrown at him, I can say without exaggeration that the Trump yard signs outnumber Clinton ones by 10-1 here in SW Pennsylvania. Most years it is dead even. I am sure the Clinton folks vote for her, but they are not proud of it, and they are not fired up. This year's vote will be decided by turnout. Even if Trump loses, there is still a good chance to maintain a GOP senate, so less to worry about, and less for gunnies to panic about.
If HRC is elected, there will be an uptick in sales. If there is a democratic senate as well, even more so. If somehow there is a democratic blowout... We will have a panic. Even so, I do not think anything the size of the Newtown mess.
Why? Everyone who wanted one already bought one four years ago. Plus AR ownership is much more widespread now, and much more widely accepted as 'normal' by the average civilian. The market is saturated with ARs, and so I think the result of a panic will be more of increased pricing than non-existent availability.