Ricardo Rosselló, center, was elected in 2016 promising to dig Puerto Rico out of a mountain of bond debt and pension obligations. Many of those problems remain unsolved. Photo: Carlos Giusti/Associated Press By Jeffrey Acevedo July 24, 2019 11:56 pm ET SAN JUAN, Puerto Rico—Puerto Rico Gov. Ricardo Rosselló said he would resign from office, bowing to public outcry over scandals that have convulsed the U.S. territory’s political system and further imperiled its economy.