Former NY city mayor Ed Koch (Democrat) may endorse John McCain:

Former New York City Mayor Edward Koch, one of the country’s most prominent Democrats, says he may cross over and back Republican Sen. John McCain for president.

In an exclusive Newsmax interview, Koch says McCain “has no equal” when it comes to opposing Islamic terrorism. Though Koch says he disagrees with most of McCain’s positions on domestic issues, he could support him because of his strong national security credentials.

Koch carries significant weight with many Jewish Democrats in New York and across the country. He also has a history of playing the maverick and crossing party lines.