Instead of Minor 1, the down impulse could be "just" Minor A...
Please don't take this as I am saying you are wrong because I am not. Just trying to share how it looks to me.
My count refers to the futures index, in which I can't consider the elections' decline as a wave 2 of a lesser degree, as it would be bigger (in price and time) than the brexit's correction. In the cash index, however, the elections' selloff isn't there, making the correction smaller than the preceding one, thus validating your nested 1-2 count, which looks just fine to me.
I'm not sure what index is the right one to analyse, so I'm guessing it's the futures index as it contains the complete price action and is actually traded by people, therefore reflecting their emotions... but I really don't know.
In relation to trading, I don't use EW anymore as I find it too difficult to trade in real time (I can always find counts that expect a rally and counts that expect a decline, in whatever time frame). Nevertheless, I like to do this type of analysis and try to discover what is going on, so I keep making EW analysis on the S&P 500, but nothing more than that. For serious trading, I use my own set of rules to enter and exit the market, and for that, my tool box is composed only by Ichimoku and price action itself, nothing more.
Hope you do well in trading, if that's your wish.