This is a reasonably big deal for a couple reasons: (1) Koch endorsed and campaigned for Bush, so he has a certain amount of credibility as an independent thinker (2) Elderly Jews, who may have some concerns about Obama because of traditional Jewish black friction and various rumors and lies about Obama's religion and relationship to anti-Israel groups, do trust and respect Koch. He could be important in influencing the Jewish vote in key swing states like Florida and Michigan. (3) There is already some concern among some Jews about Sarah Palin's church. http://www.politico.com/blogs/bensmith/0908/Koch_backs_Obama_calls_Palin_scary.html?showall Former New York Mayor Ed Koch, who endorsed and worked for George W. Bush in 2004, is endorsing Obama today, NY1 first reported. I asked Koch just now what prompted the move. "The designation of Palin to be vice president," he said. "She's scary."