republican! >> reporter: and today, marco rubio launched his own grenade at trump. >> donald trump has zero fosh policy experience. negotiating a hotel deal in another country is not foreign policy expeer yerns. >> reporter: rubio is still haunted by his bad debate. those mocking rubio robots following him to south carolina. but at a town hall meeting today, a vote of confidence. >> as far as the robot stuff, you haven't brought that up, but just keep in mind that the terminator was elected twice as governor of california. >> reporter: that won governor schwarzenegger, of course. >> and jon karl live in south carolina tonight.
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