CHS Field in St. Paul’s Lowertown district is lively on a warm summer evening. The St. Paul Saints stadium is packed with families, the crowd roars at the crack of a bat and laughs at the team’s trademark, goofy between-innings skits. But walk just a few blocks away into the heart of the city's cluster of downtown office towers and the sound of silence is unnerving. Sidewalks are mostly empty. A few cars roll by alongside the occasional bus tracking its lonely route.