U.S. News & World Report:

Mike Huckabee, the former governor of Arkansas and defeated contender for the GOP presidential nomination, is currently at the top of John McCain’s short list for a running mate. At least that’s the word from a top McCain fundraiser and longtime Republican moneyman who has spoken to McCain’s inner circle.

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Let me add that a top Republican political strategist told me about a month ago that he also believed Huckabee to be the leading veep contender.