The presumptive GOP nominee should be riding high, but . . .
1) One of his campaign aides has been suspended for promoting a "racially charged video," as Halperin calls it, to call Obama unpatriotic.
2) The Arizona senator is supposed to have a strong suit in national security, but he needs Joe Lieberman whispering in his ear to keep straight the differences between Sunnis and Shiites in Iraq and Iran.
3) Closer to home, he's well off the mark in claiming that the US has the best health-care system in the world.