Pete Buttigieg, former mayor of South Bend and 2020 presidential candidate, left, shakes hands with Former Vice President Joe Biden, as Senator Bernie Sanders, an Independent from Vermont, second left, and Senator Elizabeth Warren, a Democrat from Massachusetts, right, stand on stage ahead of the Democratic presidential debate at Saint Anselm College in Manchester, New Hampshire, U.S., on Friday, Feb. 7, 2020. The New Hampshire debates often mark a turning point in a presidential campaign, as the field of candidates is winnowed and voters begin to pay closer attention. Photographer: Adam Glanzman/Bloomberg
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