A lot has changed for Daniel Penny since he was cleared in the subway chokehold death of Jordan Neely last year.

Returning to Allegheny County after working with unhoused people in one of Philadelphia’s most troubled neighborhoods revived me, but reinforced the depth of the challenge.

Right-leaning city dwellers in their 20s and 30s say it can be hard to find people who share their political views. A raft of ...