Ruth Marcus is a columnist for The 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. A graduate of Yale College and Harvard Law School, she was a finalist for the Pulitzer Prize for Commentary in 2007. She lives in Maryland with her husband, Jon Leibowitz, their two daughters, and the world’s cutest dog.