ST. PAUL, Minn. - Barack Obama has struggled for 18 months to lock down the support of a traditionally Democratic group, Jewish voters.In the past week, John McCain may have helped Obama with his Jewish problem by choosing Alaska Gov. Sarah Palin as his running mate.(snip)But Democrats hope Palin's social conservatism, her paper-thin record on Israel, and - perhaps most importantly - her cultural roots in evangelical Christianity may be a major turnoff to Jewish voters, just as Republicans have tried to reach women disappointed that Obama didn't choose Hillary Clinton,(snip)There is almost always an inverse proportion between a candidate's popularity among...