Kenneth Adelman, Defense Policy Board member and personal friend of Dick Cheney and Donald Rumsfeld, wrote in a Washington Post op-ed before the war on February 13, 2002:
I believe demolishing Hussein's military power and liberating Iraq would be a cakewalk. Let me give simple, responsible reasons: (1) It was a cakewalk last time; (2) they've become much weaker; (3) we've become much stronger; and (4) now we're playing for keeps.
Adelman returned to his assessment in another Washington Post op-ed after the first phase of the war, on April 10, 2003, and said the war went even better than he expected.
More recently, the public learned that US troops are rounding up Iraqis from their homes in the middle of the night, holding them without due process, looting their life savings, and torturing them. Furthermore, on May 19, 2004, the US launched an airstrike in Iraq near the Syrian border which killed over 40 people attending a wedding party.
The song, "Operation Cakewalk," by Josh Wachtel and Alexei Panshin, addresses the predictions and reality of the Iraq War. Particularly, the hardships which US soliders face.
The lyrics and more songs Josh Wachtel and Alexei Panshin wrote and performed are at their website.

Kenneth Adelman
The song "Operation Cakewalk" and others are linked from:
http://www.moveleft.com/moveleft_entertainment.asp