Other interesting stories in The Washington Post:

A Carlyle Group managing director builds a hockey rink in the backyard of what was once Nixon’s home, and his neighbors are irked, reports our colleague Annie Gowen. (The latest in an occasional series of stories about rich people real estate feuds.)

(Kevin Mazur/WireImage)

Psy, very sorry about that anti-American song, he tells our colleague Chris Richards before the “Christmas in Washington” concert. Revelation: Did you know the K-Pop star went to college in Boston?

Looking for today’s Reliable Source? Start here: David Axelrod on his ‘kind of strange’ mustache shave, raising money for epilepsy research