New York Mayor Ed Koch has often said that a one-issue candidacy isn’t sufficient to run on. “If you agree with me on 9 out of 12 issues, you should vote for me,” Koch often has said. “If you agree with me on 12 out of 12 issues, you should see a psychiatrist.”

It’s not known at what date he first said this, but it could go back to the late 1970s or early 1980s.


http://tks.nationalreview.com/post/
There’s a quote from former New York City mayor Ed Koch that begins Joe Klein’s latest book: “If you agree with me on nine out of 12 issues, vote for me. If you agree with me on 12 out of 12 issues, see a psychiatrist.”


http://www.nycivic.org/articles/050114.html
A line that Ed Koch often used in his campaigns is, “If you agree with me on nine out of twelve issues, vote for me.  If you agree with me on twelve out of twelve, see a psychiatrist.” When you make a choice, think of what he said.  And remember that you can change your mind until you pull the lever.


http://ace.mu.nu/archives/176888.php
I like this Ed Koch quote: “If you agree with me on nine out of 12 issues, vote for me. If you agree with me on 12 out of 12 issues, see a psychiatrist.”


25 September 1996, Mountain Democrat (Placerville, CA), pg. A5:
Former New York City Mayor Ed Koch recently discussed politics on television. He said that if one can agree with a politician on eight out of 12 major issues he should vote for him or her. If one agrees with a politician on everything he should see a psychiatrist, obviously he is a mental case.