Newt Gingrich is shown teaching a class at West Georgia College (now known as the University of West Georgia) in the 1970s. As a politician, he has long stressed his background as a scholar. Courtesy of Gingrich Productions hide caption

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In Gingrich's Past, A Lesson On Ambition

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Former U.S. Sen. Rick Santorum greets voters this summer in Iowa. The Republican presidential hopeful has spent most of his professional life in politics. Chip Somodevilla/Getty Images hide caption

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Santorum: Early Political Work Influences Him Still

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Republican presidential candidate Ron Paul is escorted to a ballroom to speak to his supporters during the California Republican Party Convention this September in Los Angeles. The Texas congressman was once a small-town doctor who specialized in delivering babies.

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Before He Delivered For Voters, Paul Delivered Babies

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Rep. Michele Bachmann, shown speaking at a reception by the anti-tax group Iowans for Tax Relief, was once a prosecutor for the IRS. On the campaign trail, she has made that part of her resume a selling point.

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Bachmann Once Prosecuted Tax Evaders For The IRS

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Herman Cain became a vice president at Pillsbury, left that job and started over at Burger King, where he climbed the corporate ladder again. Eventually, he became CEO of Godfather's Pizza, which he is credited with turning.

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In White House Run, Cain Counts On Corporate Skill

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With shaggy hair and skinny jeans, Jon Huntsman (upper right) strikes a pose with his band, Wizard.

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Before Politics, Huntsman Aspired To Rock Star Fame

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Rick Perry's parents still live on Farm Market Road 618.

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For Rick Perry, A Restless Life On The Farm

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Mitt Romney, shown in 1993, is the former CEO of Bain & Co. In the 1980s, he started an investment fund called Bain Capital. His supporters say that's where he learned to solve big problems, create jobs and expand companies. His opponents say he made money by shutting down factories, occasionally driving companies into bankruptcy.

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The 2 Portraits Of Mitt Romney, Businessman

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