He's the go-to candidate for Tea Party Republicans who feel that Perry has betrayed them on certain key issues, such as immigration. He'll end up a nobody at the end of the day, but he might contribute to the scales tipping in favor of Romney.
As for his appeal? Business experience, never been a part of Congress (lowest approval rating in history, remember), and answers questions in a clear, honest fashion. Not presidential material, but he caters to the conservative fringe.
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Houston Texans: 3-2
Division Ranking: 1st (tie)