Washington Post owner Jeff Bezos on Wednesday announced a “significant shift” to the publisher’s opinion page that led David Shipley, the paper’s editorial page editor, to leave the paper.

In an email and social media post, Jeff Bezos outlined dramatic changes to The Washington Post’s opinions section, and announced that opinions editor David Shipley has resigned.

David Shipley, The Post’s opinion editor, is resigning after trying to persuade Jeff Bezos to reconsider the new direction.