A Republican lawmaker has launched an effort to remove Justice William M. O'Neill from the Ohio Supreme Court.   Rep. Niraj Antani, R-Miamisburg, has filed a resolution with the House Clerk's office claiming that O'Neill is violating the Code of Judicial Conduct by campaigning for the Democratic nomination for governor while remaining on the court.   A vote of two-thirds of members in both the Senate and House is required to remove a judge or justice from the bench.   "Justice O'Neill must be removed from the Supreme Court to restore the public's faith in the judiciary as a fair and independent body," Antani said in a statement.   "His declaration as a partisan candidate for governor is a clear violation of rule 4.5 of the Ohio Code of Judicial Conduct. He has taken positions on a variety of partisan issues, which has forced himself to recuse himself from all cases. This results in justice being unserved at the highest level. Ohioans will not accept this. Justice O'Neill's actions have shaken the public's trust in our judiciary and he must be removed immediately."   O'Neill couldn't be reached for comment. But he has said that he plans to step down just before he files paperwork to run by the deadline in early February.   O'Neill maintains that he won't officially be a candidate until then, and thus can stay on the court. He has also said that he has heard — but not ruled — on scores of cases, so leaving now would leave the court in the lurch. O'Neill has said he will not participate in pending cases that have not yet been heard by the court.   In his resolution, Antani said O'Neill's campaign stances should disqualify him from several categories of cases.   "He has announced his positions on a variety of issues such as legalization of recreational marijuana, raising the minimum wage, high-speed rail, renewable energy, prisons, and higher education; taking these positions have now forced him to recuse himself from all cases," it says.   Late last month, Ohio Auditor and attorney general candidate Dave Yost also called on O'Neill to leave the bench.   Chief Justice Maureen O'Connor also weighed in last month on O'Neill's judicial candidacy — albeit cautiously.   “I am aware that Justice William O’Neill has announced his intention to run for governor," she said in a statement. "I am also aware that Justice O’Neill has indicated that he intends to remain a member of the Supreme Court for the foreseeable future. Justice O’Neill’s decision to announce his candidacy is obviously a decision only he can make.   "His decision may, however, implicate a number of considerations that are governed by the Rules for the Governance of the Judiciary and the Code of Judicial Conduct. As such, it would be inappropriate for me to comment on his decision relative to those considerations. Under our current rules there is no mechanism by which this Court could require Justice O’Neill to recuse himself from any pending cases.   "I encourage Justice O’Neill to consider his future course of conduct in light of his oath of judicial office and the ethical obligations imposed upon all judges of this state, which are designed to protect the interests of litigants, the public’s trust and confidence in the fair administration of justice, and the institution of the judiciary as a separate branch of government.”   mschladen@dispatch.com   @martyschladen