BALTIMORE — Democratic presidential hopeful Bernie Sanders used a campaign stop Saturday in this economically challenged city to decry the difference between the life expectancies of the nation’s rich and poor, declaring that “poverty is a death sentence.” “If you are born in Baltimore’s poorest neighborhood, your life expectancy is almost 20 years shorter than if you’re born in its wealthiest neighborhood,” the senator from Vermont said, adding that “15 neighborhoods in Baltimore have lower life expectancies than North Korea. Two of them have a higher infant mortality rate than Palestine's West Bank.” Sanders, a self-described democratic socialist, promised an...