Anyone who enjoys exploring issues from multiple angles should definitely check out The Flip Side.
Simply subscribe, and every day you'll get an email in which they present one current event issue from both sides of the aisle. They provide a one sentence summary of how the issue is viewed by the left and the right, and then link a number of op-eds from each angle.
The Flip Side team is comprised of staffers with diverse and competing ideologies, so you really do get both perspectives with no underlying bias one way or the other. Whatever your leaning, you'll find several articles that support your position, and several that challenge it.
Whether you're curious to get outside your echo chamber, or interested in finding out how the opposition thinks so you can debunk it, The Flip Side is a terrific resource, and we highly recommend it!