Topic
How to Read the Final Pre-Midterm Poll Numbers Like an Analyst
The NBC poll's approval, economy and party-image figures each answer a different question. Here is what each one does and does not tell you before Tuesday.
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Topic
How Exit Polls Are Made and What They Can't Tell You
Interviewers, weighting, and a long night of adjustment sit behind every election-night number.
Topic
How to Read Political Polls — Margin of Error, Weighting, Wording: Read a Poll in Three Moves
Most readers stop at the headline number. The three checks below take two minutes and catch most of what polls hide.