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. The changes upended precedent and rattled a media company that has already been shaken by years of turmoil and leadership turnover.

This is not about siding with any political party. This is about being crystal clear about what we stand for as a newspaper,” publisher and CEO Will Lewis added.

We are going to be writing every day in support and defense of two pillars: personal liberties and free markets," Washington Post owner Jeff Bezos wrote to staff.