Generally he did quite poorly in the suburbs (this is why he came up short in FL, NV, and OH), and at the time there was a lot of hand-wringing about how 95 of the 100 fastest-growing counties in the country had voted Republican. Of course, those areas were all devastated by the subprime collapse and haven't been nearly as strong for the GOP since.
Haven't run the '16 GE numbers, but this should be a clue as to where to quickly summarize the data for anybody interested, assuming we are talking about increase in % of Pop vs total pop increase....
https://factfinder.census.gov/faces/tableservices/jsf/pages/productview.xhtml?src=bkmk
