It is considered unusual for a former governor who holds no public office and is not currently running for another to have a foreign policy adviser. But Sarah Palin, not known for being conventional, has chosen Peter Schweizer for that job. Schweizer is a research fellow at the Hoover Institution with expertise in international relations, national security affairs, and the U.S. presidency. He is also the author of a number of books, including two on President Reagan, one on the Bush family, and a critique on the effects of big government on the world economy. Most recently, Schweizer published a...