From the introduction:
The recent elections of Donald Trump and Barack Obama were influenced in no small measure by shifts in the nation’s underlying demographic structure—the rise of communities of color, the increase in the number of older Americans, the sharpening of education divisions—and the distinctive voting behavior of these demographic groups. This 2018 report of the States of Change project, the fourth in an annual series, examines an array of future presidential election outcome scenarios—from 2020 through 2036—that could arise as the demography of the nation and its 50 states changes over the next 18 years.
These scenarios, developed by the authors, include outcomes that favor both Republican and Democratic candidates. They are not intended as predictions but are simulations based on assumptions about different demographic groups’ future voting patterns. Each of the alternative scenarios assumes the same projections for the nation’s underlying demographic structure of eligible voters (EVs) with respect to race, age, and education attainment. As such, the scenarios provide for a more in-depth understanding than national or state polling trends can supply about how emerging voting patterns may interact with changes in the demography of the nation’s electorate to affect future popular vote and Electoral College outcomes…..