How did pollsters miss the Republican tsunami?

USA TODAY: Republicans out-performed their poll numbers in race after race Tuesday, raising questions about pro-Democratic bias in this year’s election’s polls — a major turnaround from the pro-GOP bias in 2012’s polls.

The series of misses caused at least one political forecaster — Larry Sabato of the widely read Center for Politics’ Crystal Ball — to call for changes to the industry Wednesday…

In all eight of this year’s marquee Senate races, Republican candidates beat the polling averages compiled by Real Clear Politics, and in two of the races — North Carolina and Kansas — Republicans pulled off upset victories. Results were similar for governor races, including Republican wins in three states — Florida, Illinois and Maryland — where polls generally showed Democrats in the lead… (more)

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