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The contents of this huge basket of goods and services is reviewed every year to ensure it gives an accurate cross-section and weighting of our spending data.

To make up for such issues, many of the most high-profile polls now function more like models, with firms weighting responses from different groups and making other assumptions about factors such as turnout.

“There’s many different polls forecasters use, weighting schemes, things like that. Some forecasters don’t like to use Trafalgar,” Tranter said, referring to a pollster that frequently has move favorable numbers for Trump than others.

Silver has adopted the FiveThirtyEight system of weighting polls differently, ostensibly based on reliability.

Texas' highest court ruled that the state law never required that the risk to a mother’s life be “imminent” when weighting whether they are eligible for an abortion.