The Libertarian Party has nominated former Republican congressman (and Clinton impeachment manager) Bob Barr as its presidential candidate. Barr seems to be courting some of the same anti-war/small government conservative support as Ron Paul’s campaign (which is still going, incidentally).

The natural conclusion to draw here is that this will hurt McCain, if anyone. Barr is the most mainstream figure the Libertarians have nominated in years and is likely to get decent and respectful media coverage. He also represents the obvious alternative for disaffected Republicans in the traditional limited government mold. (Rather than, say, Republicans who are disappointed that McCain isn’t pro-torture enough.)