Dominic LeBlanc has no time for “51st state” jokes. He’s too busy trying to keep the U.S. from slapping tariffs on its neighbor to the north.

The apartments — located in Homewood, the Hill District, Oakland, West Mifflin, and elsewhere — have been plagued by safety problems and complaints from tenants of poor living conditions.

Although there is no formal definition, a sanctuary city or state typically refers to local and state governments imposing ...