Rick Perry, Ron Paul on opposite trajectories

San Francisco Chronicle-'Agree or disagree with his policy positions, it would be hard to argue that he is not a principled candidate,' said Cindy Rugeley, a political scientist at Texas Tech University. '

One is the most powerful politician in Texas, a governor so popular with Republican conservatives that he crushed the state's senior U.S. senator in a GOP primary in 2010.

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"Agree or disagree with his policy positions, it would be hard to argue that he is not a principled candidate," said Cindy Rugeley, a political scientist at Texas Tech University. "If conservatives and libertarians and supporters of the Tea Party are sincerely looking for a candidate who honestly represents what they say they believe, Ron Paul is that person."

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