You Won't Be Shocked by Which Party Polling 'Errors' Have Massively Favored (According to an Audit)

Doug P. | 12:17 PM on August 19, 2026

Republican voters should never be discouraged by polls that might show Democrat candidates with a lead to the point of discouragement from voting because often that's the goal.

As a matter of fact, an audit of how thousands of polls over the past several Senate elections have performed makes it abundantly clear what's going on.

🚨 NEW: Deep dive investigation into 3,000+ Senate polls over the last 4 cycles. They've overestimated Democrats in all 4 cycles, 73% of polls overstate the Democrat, and it's worse right now, in the summer. https://t.co/CQb0WIKpAs
— Patrick Ruffini (@PatrickRuffini) August 18, 2026

Really interesting work from Patrick Ruffini. Across 3,312 Senate polls over four cycles, he finds a D+3.7 average error, with 73% overstating Democrats. Even more interesting is that the error peaks around D+5.9 in late July before narrowing toward Election Day.

That adds an… https://t.co/c1nC4baSiU pic.twitter.com/CIIWLgNFj3
— Quantus Insights (@QuantusInsights) August 18, 2026

Here's the rest of the above post:

That adds an important dimension to what we found in our broader Quantus Insights Apr 23, 2025 study. We documented a persistent post-2016 directional error, including roughly D+4.2 across presidential battlegrounds, with some of the largest misses among working-class, rural and non-college electorates.
Aside from this problem being directional there’s also a seasonal component too, particularly in midterms, when summer polling can substantially overstate Democratic strength. It’s not until days into October before the electorate comes into clearer focus.