Rabid drug-warrior Bob Barr and the equally avid, though low-key, drug warrior John Linder are in a dead-heat Republican primary this Tuesday in Georgia's newly drawn 7th Congressional District. The question is, if Barr loses how much credit can the national Libertarian Party claim? The LP's fetchingly named "Incumbent Killer Strategy" has -- with good reason -- targeted Barr as the drug war's point man. So the party has purchased nearly $50,000 of airtime on metro Atlanta cable stations (with a few ads on broadcast Fox and NBC slated for this final, pre-primary weekend) for a wrenching, 30-second ad featuring...