If he runs, it will be as a moderate third-party candidate.

如果他加入竞选，他将作为一个中立的第三方候选人。

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Ross Perot, a super-wealthy, third-party candidate making his first run for the office.

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As for a possible third-party candidate, as suggested by Tony Perkins, president of the Family Research Council, that's not going to happen.

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Some of these social conservatives are nonetheless so appalled by Mr Giuliani that they threaten to back a third-party candidate if he wins the Republican nomination.

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