May 24, 2012 7:22 AM
As his campaign evaluates potential running mates, Republicans with a possible shot at the No. 2 spot on the presidential ticket are starting to engage in unofficial public tryouts for the traditional vice presidential role of attack dog.
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It is estimated that in November 2008 there were about 4,331,000 potential voters 18 years of age and older. An estimated 69% of eligible voters cast 2,983,417 ballots in the 2008 presidential election.