He tried to torpedo public broadcasting because they weren't safe. They were pointing things out, and there were no special economic interests (then) preventing them from revealing the embarrassing details.
Well, it seems that Dubya feels that there isn't enough government control over what the people at PBS say.
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One thing you can say for Nixon - he wasn't a crook, he was a dupe, that much is true. But he also had a sense of shame. He knew when he did something wrong and he took the right way out.