Instead of siphoning votes from Sen. McCain (R-Ariz.), Barr said that his support would come from “disaffected Republican voters, Ron Paul supporters and independent voters and Democratic voters who believe in a strong message of civil liberties.” To him, both the Republican McCain and Democratic Sens. Hillary Rodham Clinton (N.Y.) and Barack Obama (Ill.) fail to offer “a real choice” in November, especially on his No. 1 issue, reducing the size of government.

Of course, there’s the chance that Barr’s campaign won’t make much of an impact.

“I can’t imagine Bob Barr or any other Libertarian candidate making any difference in this election,” said Charlie Cook, editor of the Cook Political Report. “This is likely to be a massive-turnout election, which will wash out the impact of fringe candidates on either end of the spectrum.”