Juan Cole explains why Cheney must be impeached:

Lawrence Wilkerson, an aide to Colin Powell when he was secretary of state says that Iran in 2003 offered to help stabilize Iraq and to cut off aid to Hizbullah in Lebanon and to Hamas. Wilkerson says that the State Department was interested in pursuing the offer, which presumably came from reformist president Mohammad Khatami. He says that when the issue was broached with VP Richard Bruce Cheney, Cheney shot down any notion of "talking to evil." As if Mohammad Khatami is evil and Richard Bruce Cheney is not. (Cheney's lies about Iraq's weapons of mass destruction and connection to 9/11 have gotten hundreds of thousands of people killed). Because Khatami kept promising that his reforms would make Iranians better off, and because the US rejected all his overtures and left him with no achievements to show for them, the Iranian electorate turned against the reform movement and put Mahmud Ahmadinejad into power, a loud-mouthed braggart of a sort that Cheney's Likudniks could then build up into a bogey man to frighten Americans with. Cheney created Iran as a menace. What this article doesn't mention is that the rightwing Likud cabal in Cheney's office, such as Irv Lewis Libby, with its connections to the Israeli far right, almost certainly played a key role in this rejection. I think John Hannah was already there then, too. David Wurmser came later, after getting up the fraudulent case against Iraq in the Pentagon "Office of Special Plans" (i.e. foreign policy plumbers) set up by Likudnik Douglas Feith, then the number 3 man in the Pentagon. Libby is now on trial for lying to the special prosecutor about his role in betraying CIA operative Valerie Plame Wilson. Wilson had been working on anti-proliferation efforts versus . . . Iran. She was outed to punish her husband for publicly challenging Cheney's lies about WMD in Iraq. Cheney is the most fascistic high official in US government in history. He recently implied that al-Qaeda is glad that the Democrats won the mid-term elections, as his way of trying to create the impression that anyone who disagrees with him is a terrorist-loving traitor. But it is Cheney who is the traitor, with his office having betrayed Valerie to the Iranians (and everyone else in the world). Fascism depends on the creation of straw man enemies said to be dire threats to the Homeland. Iran is a poor weak third world country and poses no threat to the US. It hasn't aggressively invaded another country for over a century. But Cheney needs Iran to substitute for the old Soviet Union, otherwise how could he get you to agree to let him listen in on your telephone calls without a warrant, or let him torture people? Cheney is the much bigger threat to the integrity of the US constitution than any foreign force. He should be impeached. If lying about a tawdry affair that did not even get to third base is grounds for impeachment, then lying us into a war, slapping Iran's overtures away and setting the stage for another war, and outing a CIA operative certainly are.