It is asinine to compare the impeachment trial of Renato Corona to a case pending before a court of law.
An impeachment is a political process exclusive to the legislative branch of government while a court trial is a judicial process exclusive to the judicial branch of government.
Second, guilt beyond reasonable doubt is the bar in a court of law, while Aye and Nay votes that may or may not have anything to do with the guilt of the accused and do not even require an explanation from the senator/judges determine the outcome of an impeachment.
Third, the penalty for conviction in an impeachment trial is removal from office. There is no imprisonment or fines that go with it whereas conviction in a court of law can carry a sentence of imprisonment plus fines.
Fourth, what is absolutely forbidden is to try to influence a proceeding in a court of law. It is a crime. But it is okay for anybody from the president on down to try to influence the outcome of an impeachment because it is a political process and the entire body politic has a stake in its outcome.
And so those who say that Pres Aquino committed an impeachable offense because he tried to sway senator/judges into voting to convict Corona are confusing a political process with a judicial proceeding, it is akin to mistaking a hole in the ground for one’s ass.