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Bari Weiss, a founder of The Free Press, will become editor in chief of CBS News.

By Benjamin MullinLauren Hirsch and Michael M. Grynbaum

The Bari Weiss era at CBS News has begun.

In a move that is expected to shake up the broadcast news landscape, CBS’s owner, Paramount, said on Monday that it was buying The Free Press, an upstart digital news site founded just four years ago, and appointing Ms. Weiss, one of its founders, as the editor in chief of CBS News.