Class action tolling means suspending time limits on future lawsuits while a class action suit is pending. This is distinct from class action trolling which is when the Ninth Circuit adopts a deliriously liberal rule and dares the Supreme Court to overturn it. Both phenomena were involved in today’s unanimous Supreme Court opinion in China Agritech v. Resh. In the 1974 case of American Pipe & Construction v. Utah the Court had adopted a rule permitting individual claimants to file otherwise-tardy actions after a court had declined to certify a class action. The American Pipe rule is itself decidedly indulgent toward the class action device, but it took the Ninth Circuit to take a crucial extra step off the Santa Monica pier by holding that the late-arriving claimants should themselves be able to ask for certification as a class action. After all, the first try at certification might have been based on a flawed legal strategy or incomplete factual record. Why not give our friends in the bar a second bite? Or a third bite, or an nth: in fact the case that reached the high court was the third class action in a row attempted on the same underlying facts, a securities dispute. To almost everyone but the Ninth Circuit, the resulting danger was clear enough: without any real need to accept “no” for an answer, class action lawyers could just come back again and again with new tame plaintiffs until they find a judge willing to grant certification, the step that tends to guarantee a payday in the class action business. Today’s unanimity is significant. On procedural and jurisdictional issues, at least, today’s liberal wing on the Court has sometimes been willing to unite with the Rehnquist-Scalia-Roberts wing to recognize and rein in the dangers of lawyer-driven overlitigation, the tactical use of lawsuits as a weapon, and so forth. Justice Ruth Bader Ginsburg, who wrote today’s opinion, has more than once joined and sometimes led such coalitions. By contrast, Justice Sonia Sotomayor has often been found alone and out on a limb in favor of a more litigation-friendly position, which happened again today: she joined in a concurrence agreeing that the Ninth Circuit had gone too far but seeking to limit the Court’s holding to securities suits governed by the Private Securities Litigation Reform Act of 1995 (PSLRA). The Senate might want to quiz future liberal nominees — yes, there will be such — on whether they more favor the Ginsburg or the Sotomayor approach to these issues.