Do national polls systematically overstate support for Democratic candidates?
Core argument: A Pew Research Center analysis found that 93% of national polls in 2020 overstated support for Democratic candidates, compared with 88% of polls in 2016.
A Pew Research Center analysis revealed that 93% of national polls in 2020 overstated Democratic candidates' support, a trend also seen in 2016 with 88% of polls. This persistent overestimation highlights significant polling errors, marking the highest in 40 years for the national popular vote and at least 20 years for state-level estimates. The American Association for Public Opinion Research (AAPOR) identified consistent errors favoring Biden over Trump across various survey modes. Potential explanations include nonresponse bias, where Trump's strongest supporters may have opted out of participating, skewing results. Despite efforts to address these issues, the root causes remain uncertain, underscoring the need for continued scrutiny and improvement in polling methodologies to ensure accurate reflections of voter sentiment.













Ed Comment: A 20% increase in volume is extraordinary. I think it stems from saving being sold to offshore savers.