Big fan of these kind of UK US combos, so much so I made some maps like yours for previous elections in the past 10 years. Hope you don't mind, though imitation is the sincerest form of flattery .2019 USA General Election
2017:
2015:
and 2010:
Again, hope you're fine with it, just had a bit of free time on my hands and thought it'll be interesting to see how your idea could be developed on.