“On Monday, U.S. prosecutors will ask 12 people to authorize a punishment that hasn’t been levied on a Manhattan defendant since 1963: death. Sayfullo Saipov, 35, was convicted last month of fatally mowing down eight people as he raced a truck down a West Side bike path in 2017. Now comes the phase of his trial that will determine his punishment: The U.S. government wants to end Mr. Saipov’s life with a lethal injection. To succeed, prosecutors must win a unanimous vote from the jurors, who will deliberate in a city that has been both a bastion of liberalism and a stage for repeated acts of terrorism. The clash over Mr. Saipov’s fate will test how a jury in the Southern District of New York — which includes Manhattan, the Bronx, Westchester and five other downstate counties — weighs crime against punishment two decades after 9/11.”