Ruth Marcus is a columnist for The Washington Post, specializing in American politics and domestic policy. Marcus has been with The Post since 1984. She joined the national staff in 1986, covering campaign finance, the Justice Department, the Supreme Court and the White House. From 1999 through 2002, she served as deputy national editor, supervising reporters who covered money and politics, Congress, the Supreme Court, and other national issues. She joined the editorial board in 2003 and began writing a regular column in 2006.