Slate is an online magazine that covers current affairs, politics, and culture in the United States from a liberal perspective. It was created in 1996 by former New Republic editor Michael Kinsley, initially under the ownership of Microsoft as part of MSN. On December 21, 2004, it was purchased by The Washington Post Company, later renamed the Graham Holdings Company. Since June 4, 2008, Slate has been managed by The Slate Group, an online publishing entity created by the Graham Holdings Company to develop and manage web-only magazines. Slate is based in New York City, with an additional office in Washington, D.C. {Wikipedia}

https://en.m.wikipedia.org/wiki/Slate_(magazine)