Nexstar to Replace Local Network News Segments With NewsNation

A producer works in the control room at the Chicago studios of NewsNation.Photographer: Brian Cassella/Chicago Tribune/Getty Images

Nexstar Media Group Inc., the largest owner of local television stations in the US, has embarked on a sweeping effort to limit the reach of national networks like ABC, NBC and CBS through its affiliate stations across the country, according to a regulatory document and people with knowledge of the matter.

The Irving, Texas-based media company has begun preventing its stations from filling local newscasts with segments produced by national networks, asking them to use content from its NewsNation cable channel instead.