PHILADELPHIA (JTA) -- The Obama administration's tilt against Israel, its tacit acceptance of a nuclear-armed Iran and its weak approach to combating Islamic terrorism all pose a direct challenge to Jewish Americans. Former Alaska Gov. Sarah Palin has described the "Obama doctrine" in U.S. foreign policy as "coddling our enemies while alienating allies." Palin has emerged as the leading public voice in opposition to President Obama's dangerous new direction. For these reasons, my colleagues and I are launching a national organization of Jewish Americans for Sarah Palin, supported by the new Web site JewsforSarah.com -- Home Page for Jewish Independents....