Political party margins between the 2016 Presidential election and 2018 Midterm elections

Margin = % Democrat - % Republican

Note: Suburbs are counties within the 100 largest metros. Large inner suburbs are 75-95% urbanized. Large outer suburbs are less than 75% urbanized.

Chart: Madison Hall Source: Source: Data from William H. Frey’s analysis of US Census Data and Davie Liep’s Atlas of US Presidential Elections