The Republican Senator criticizes McCain for seemingly questioning Obama's patriotism and motives in latest attacks on CBS's "Face the Nation." Watch video above.
"I think John is treading on some very thin ground here when he impugns motives.... John's better than that."
Also hits McCain on latest ad, says it is "not appropriate." Read transcript here.
Adds: "Both of these men are smart, capable, decent men who love their country."
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