* While it's true that accurate portrayals of liberals will often look negative, it's more important for portrayals of liberals and other opponents of conservatism to be as accurate as possible, rather than simply as negative as possible. It's hard to know thy enemy when useful, verifiable facts are listed aside largely groundless accusations.
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* Similarly, it's important not to whitewash mistakes made by conservatives in the past. That conservative policies are best for the country doesn't mean that the history of conservatism is just an endless chain of people making perfect decisions. It's better to learn from the past then to cover it up or disingenuously shift the buck to other groups. That Nixon's policies were generally right for the country doesn't change the fact that he was a sweaty little liar.