This is Face the Nation: August 5

      |The race is close in the battleground states, and key voices from four of them offer their opinions on Campaign 2012: Gov. Bob McDonnell, R-Va., former Gov. Ted Strickland, D-Ohio, former Gov. Ed Rendell, D-Penn., and Rep. Mario Diaz-Balart, R-Fla. Plus, an interview with Justice Sandra Day O'Connor. And, a roundtable with Michael Crowley, Julianna Goldman, Nancy Cordes and Jan Crawford.

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