The less-than-500 counties that Clinton won nationwide combined to generate 64 percent of America's economic activity in 2015. The more-than-2,600 counties that Trump won combined to generate 36 percent of the country's economic activity last year.

https://www.washingtonpost.com/news/wonk/wp/2016/11/22/donald-trump-lost-most-of-the-american-economy-in-this-election/