Special elections to the U.S. House of Representatives tend to be low-turnout events, historically speaking, and seldom result in seats switching from one party to another.
Pew Research Center President Michael Dimock examines the changes – some profound, some subtle – that the U.S. experienced during Barack Obama’s presidency.
For Pew Research’s 10-year anniversary, here’s a list of 10 big research questions we’ve answered over the years that speak to broad ways that America and the world is changing.