See the latest Pew Research Center data on U.S. political party affiliation, including trends in voting and elections.

Pew Research CenterMarch 29, 2018

Why do people belong to a party? Negative views of the opposing party are a major factor

Sizable majorities of Democrats and Republicans cite the other party’s harmful policies as a major reason they belong to their party.

Pew Research CenterMarch 8, 2018

Negative views of democracy more widespread in countries with low political affiliation

Across 35 nations, a median of 26% do not identify with any political party in their country. In countries where more people are unaffiliated with any political party, popular support for representative democracy is also lower.