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Rudy's tough-guy act would make all 3 of them weak. One of the GOP's main tactics is to make the Democrats seem emasculated (ironically Hillary seems immune to that) and people fall for his macho schtick. McCain is too old to project that image and the others have their own image problems. I suppose that's why he was leading the polls awhile back, I am relieved he seems to be on the way out.