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Newt Gingrich's farewell: Holograms, brain science and lunar colonies

"Today I'm suspending the campaign. But spending the campaign does not mean suspending citizenship. Callista and I are committed to being active citizens. We owe it to America," Gingrich said at a speech to supporters in Arlington, Va., with his wife by his side. 



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He vowed to continue fighting for the policy positions he advocated on the campaign trail. Watch the video for some of the highlights from Gingrich's remarks.

Click here for more on Gingrich's exit from the GOP presidential contest on The Hill's Ballot Box blog.

—Video by Geneva Sands.