The new tack against Supreme Court Chief Justice Maria Lourdes Sereno is a quo warranto petition in tandem with an impeachment trial before the Senate.

This double-barrel assault against the chief magistrate is bound to boomerang because there are no credible and concrete impeachable offenses against Sereno, while the one-year prescriptive period for filing an action for quo warranto has long prescribed pursuant to Section 11 of Rule 66 of the Rules of Court.

Moreover, the appointment of Sereno is valid and constitutional as it complied with the basic requirements of the Constitution and her appointment was endorsed to former President Benigno Aquino III by the Judicial and Bar Council five years ago.

A petition for quo warranto filed with the Supreme Court will be adjudicated by a hostile forum where seven associate justices mutinied to oust Sereno even as they later compelled her to file an indefinite leave of absence, which has no legal anchorage.

EDCEL C. LAGMAN