The Supreme Court hit the trifecta yesterday: Three cases involving the First Amendment. Three dismaying decisions by Chief Justice John Roberts’s new conservative majority.

Chief Justice Roberts and the four others in his ascendant bloc used the next-to-last decision day of this term to reopen the political system to a new flood of special-interest money, to weaken protection of student expression and to make it harder for citizens to challenge government violations of the separation of church and state. In the process, the reconfigured court extended its noxious habit of casting aside precedents without acknowledging it  insincere judicial modesty scored by Justice Antonin Scalia in a concurring opinion.

First, campaign finance. Four years ago, a differently constituted court upheld sensible provisions of the McCain-Feingold Act designed to prevent corporations and labor unions from circumventing the ban on their spending in federal campaigns by bankrolling phony “issue ads.” These ads purport to just educate voters about a policy issue, but are really aimed at a particular candidate.

The 2003 ruling correctly found that the bogus issue ads were the functional equivalent of campaign ads and upheld the Congressional restrictions on corporate and union money. Yet the Roberts court shifted course in response to sham issue ads run on radio and TV by a group called Wisconsin Right to Life with major funding from corporations opposed to Senator Russell Feingold, the Democrat who co-authored the act.