2020 New Hampshire primary election: Many polls didn't see an Amy Klobuchar surge coming

She 'overperformed by 8 percentage points.  Much more closer to home, Sanders 'underperformed' by 3.

Sources:  Real Clear Politics, The New York Times

Bernie Sanders Scores Narrow Victory in New Hampshire Primary.  (The New York Times, 2/11/2020)

But in both states he captured less than 30 percent of the vote, and his vote share was the lowest total ever for a winner in the primary here. Coupled with the abrupt rise of Mr. Buttigieg and Ms. Klobuchar, his modest success only underscored the churning uncertainty of the race and raised the prospect of a drawn-out nominating process that could last through the spring.

The checkerboard results, as provided by the New York Times.