Ruth Allyn Marcus (born May 15, 1958)[2][3] is an American political commentator and journalist who writes an op-ed column for The Washington Post and serves as the Deputy Editorial Page Editor for the newspaper.

She attended school in Livingston with and has remained a close friend of fellow columnist Mona Charen.

Marcus began writing for The Washington Post while still in law school, and formally joined the paper after graduation.

She joined the national staff in 1986, covering campaign finance, the Justice Department, the Supreme Court and the White House.

[8]Marcus is married to former Federal Trade Commission Chairman Jon Leibowitz, a Democrat.