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.

More than 75,000 digital subscribers have canceled their subscriptions to The Washington Post following an announcement by its owner, Jeff Bezos, that the paper’s opinion section would be revamped to align with libertarian ideals touting “personal liberties” and “free markets,