According to early estimates out of Iowa, former South Bend, Indiana, Mayor Pete Buttigieg won 14 pledged delegates to the Democratic National Convention, Sen. Bernie Sanders won 12, Sen. Elizabeth Warren won eight, former Vice President Joe Biden won six and Sen. Amy Klobuchar won one. But how did Klobuchar snag a national delegate when her share of the statewide vote was 12 percent,1 below the delegate threshold of 15 percent? It’s because she got more than 15 percent in Iowa’s 4th Congressional District, and around two-thirds of Iowa’s delegates are awarded based on results at the district level, not the statewide level.

Every president’s election-year nightmare — a recession — is suddenly looming over the 2020 race. In a survey released earlier this week by the National Association of Business Economics, 38 percent of economists predicted that the country will slip into an economic downturn next year, and another recent poll of economists put the chances of a recession in the next 12 months at 1 in 3. Those predictions are getting a lot of attention, and it’s not hard to see why — an economic slowdown in the middle of the presidential election cycle could reshape the race, potentially changing the calculus of Democratic primary voters and undermining President Trump, who has made the strong economy a central selling point of his presidency.

Welcome to The Riddler. Every week, I offer up problems related to the things we hold dear around here: math, logic and probability. Two puzzles are presented each week: the Riddler Express for those of you who want something bite-size and the Riddler Classic for those of you in the slow-puzzle movement. Submit a correct answer for either,1 and you may get a shoutout in next week’s column. If you need a hint or have a favorite puzzle collecting dust in your attic, find me on Twitter.

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