Who are the Democratic superdelegates?
The 700+ unpledged party leaders and elected officials are mostly white, mostly men and mostly Hillary Clinton supporters.
Numbers, Facts and Trends Shaping Your World
Many people wonder: Can polls be trusted? The following essay contains a big-picture review of the state of polling, organized around a number of key areas.
One possible explanation for the variability in estimates across the different nonprobability samples is the range of methods that online sample vendors employ. They differ on recruitment, weighting and everything in between. Even if the impact of each of these differences is small, the cumulative effect could be much larger. Panel recruitment and survey sampling […]