Citizens United and Supreme Court Precedent

My old friend E. J. Dionne of the Washington Post writes that the Citizens United v. FEC rehearing on Wednesday is "A Test Case for Roberts." Because, you see, Chief Justice John Roberts said in his confirmation hearings that "it is a jolt to the legal system when you overrule a precedent. Precedent plays an important role in promoting stability and evenhandedness. It is not enough -- and the court has emphasized this on several occasions -- it is not enough that you may think the prior decision was wrongly decided."

Dionne says that if Roberts and the Court overturn the precedents that seem to point to banning a movie with a political agenda because it was produced by a nonprofit corporation, "he will unleash havoc in our political system and greatly undermine the legitimacy of the court he leads."

I disagree with Dionne on the scope of the First Amendment's protection of free speech. But I sort of admire him for staking out such a strong stand in favor of precedent and "settled expectations." After all, a firm commitment to precedent can lead to some uncomfortable positions. Given the firmness of Dionne's reliance on the importance of precedent and "settled expectations" to "the legitimacy of the court," I assume he has opposed previous cases where the Court overturned settled law and its own precedent. Such as Brown v. Board of Education, which overturned a 58-year-old case, Plessy v. Ferguson. And Lawrence v. Texas, which overturned a 17-year-old precedent that had upheld state sodomy laws.

Or surely he does not mean that only precedents he approves of are deserving of respect and vital to the legitimacy of the court?