The next rationale for the war in Iraq was that Saddam had ties to terrorists. But he didn't.
The next rationale for the war in Iraq was that Saddam was a brutal dictator who had killed hundreds thousands of his own people every year. But then we killed tens of thousands of his people in less than two years time - perhaps even a hundred thousand[http://news.bbc.co.uk/2/hi/middle_east/3962969.stm], according to a demographic research published in the Lancet[http://www.thelancet.com/journal/vol364/iss9448/full/llan.364.9448.primary_research.31264.1]
The next rationale for the war in Iraq was that we could make democracy flourish in the Middle East, put a dent in militant Islam, improve America's standing in the Arab world, and make Israel safer--all by "liberating" Iraq. But we haven't created a democracy, militant Islam is at a fever pitch, our [[occupation of Iraq]] has created unparalleled ill will in the Arab world, and it would be delusional to think that [[Israel]] is safer today than before the war.