David Leonhardt: Save local journalism! Support nonprofit news organizations.

Anyone who’s worried about the state of local journalism faces a conundrum.On the one hand, good local news coverage brings big societal benefits, as multiple studies have found. When newspapers shrink or close, voter turnout and civic engagement tend to decline, while political corruption and polarization rise. Even I — a journalist, obviously — have been surprised by the magnitude of these findings.On the other hand, some of the country’s largest local newspaper owners,