More trouble for Governor Rowland: A lawyer for the state Legislature urged the state Supreme Court on Friday to compel Gov. John G. Rowland to testify before a panel considering his impeachment. At the opening of the two-hour hearing, Rowland's lawyer renewed his past objections to a subpoena ordering the governor's testimony, saying the Legislature was intruding on the separation of powers among branches of government. "The subpoena effectively treats the governor as a subservient officer," Ross Garber said. But the Legislature's lawyer, Cynthia Arato, said courts have already ruled that the judicial branch can subpoena a governor, and she argued the Legislature should receive the same treatment."We're all co-equal branches. If a court's compelling of testimony does not violate the separation of powers, the compelling of testimony by the impeachment committee doesn't," Arato said.