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  Nov 1, 2011 4:03pm Candidates Contrast on Energy Subsidies at Iowa Forum PELLA, Iowa – Rep. Michele Bachmann and Newt Gingrich differed the most today on energy subsidies and tax credits at a candidates’ forum here, with Bachmann saying she believes energy industries “need to stand on their own” and Gingrich calling it a “national security issue.” They joined three other GOP presidential ca…