There have been significant population shifts in the last two decades in this country, and that has had a big impact on U.S. politics.
These demographic shifts are, in large measure, the reason why some states, like Ohio and Iowa, are no longer swing states — and why some have come on the map, like Georgia and Arizona.
These demographic shifts have also coincided with shifts within the parties. Republicans have been able to win over larger percentages of whites without college degrees, while Democrats have gained with college-educated white voters and Asian Americans, while also largely maintaining advantages with Black voters and Latinos.
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