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Romney video: Gingrich promoted 'Gore's liberal global warming agenda'

Mitt Romney upped the ante against Newt Gingrich, his main rival for the GOP presidential nomination, by tying the former Speaker to Nancy Pelosi and Al Gore.

The former Massachusetts governor released a Web video Wednesday that highlights the 2008 ad Gingrich cut with Pelosi calling for action to fight global warming.

Romney has released a series of Web ads attacking Gingrich as the former Speaker has taken the lead in national polls and in several state polls. All contain the tagline: “With friends like Newt, who needs the left?”

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