Lt. Gov. David Dewhurst did not have to go there.Nobody at a Tea Party meeting Monday night in Bedford asked him about impeaching the president of the United States.No, the lieutenant governor of Texas apparently went there totally on his own, calling for impeachment over the attack last year on American diplomats in Libya and unspecific trampling on our liberties.Dewhurst, a former U.S. State Department diplomat and undercover CIA case officer in Bolivia, knows exactly how serious it is to call for a presidential trial over specific high Crimes and Misdemeanors.According to the liberal Texas Observer, Dewhurst told a candidate forum: This election is about protecting you and your freedoms, which are given to you by God, but which are being trampled on by Barack Obama right now. I dont know about you, but Barack Obama ought to be impeached not only for trampling on our liberties, but what he did in Benghazi is just a crime.Dewhurst spokesman Travis Considine confirmed the comments to the online Texas Tribune. He said Dewhurst feels the U.S. House should consider impeachment proceedings over the Benghazi attack, border security and executive decisions under the Affordable Care Act.As an ex-CIA operative and a Texas government official solemnly sworn to uphold the Constitution, Dewhurst knows that impeachment requires serious evidence of treason, bribery or a criminal act.Lacking evidence, he is just telling this particular Tea Party what it wants to hear.At least when U.S. Rep. Michael Burgess called for impeachment before this group in 2011, he was answering a question and acknowledged his intent to politically tie things up. Dewhurst seems serious or serious about impressing a Tea Party group.Facing three seasoned opponents in his bid for the Republican nomination, and with a veteran Democratic senator considering a general-election campaign next fall, Dewhurst should not be tossing the word impeachment around as lightly as tip coins at Austin Land & Cattle.Now he can no longer take umbrage if an opponent remembers his poor clock management at the end of the June special session and calls for impeaching a lieutenant governor.