Is John Bolton on staff at the Washington Post?

Over at UN Dispatch, Mark Goldberg notices that John Bolton has been getting an awful lot of ink lately:

If you feel like you have been reading a lot of John Bolton recently, it's because you have. A Nexis search reveals that over the past 12 weeks, John Bolton has been published on the op-ed page of a major American publication nine times. That's three times in the Washington Post, once in the New York Times, once in The Los Angeles Times, twice in the Wall Street Journal and three in the Washington Times. This is an average of just under one op-ed a week, per week, for the last three months.

That means the Washington Post has been running a Bolton op-ed once a month. Way to give your readers a diversity of viewpoints...