The Census Bureau released two important sets of data last week that have big implications for American politics — and that challenge some prevailing assumptions for both Democrats and Republicans.
The first set of data lays out long-term demographic trends widely thought to favor Democrats: Hispanics, Asian-Americans and multiracial voters grew as a share of the electorate over the last two presidential races, and white voters — who historically tend to back the G.O.P. — fell to 71 percent in 2020 from 73 percent in 2016.