To find out where their druthers lie w/r/t Republicanism (if there is such a thing that doesn't boil down to plain arithmetic), check Commentary's January 2010 article on Sarah Palin (title it's "Do Jews Hate Sarah Palin?" or similar) ; they will let you know candidly what and whom they dislike, loathe, or hate in American sociopolitical culture (one gets the impression, it's just about everything west of the Blue Ridge).
Other comments in a cascade flowed from that article; see David Frum's blog, for a closely contemporary comment by him and many reader comments all of which are interesting, and then a Gawker article by "Pareena" on Blum's blog article and the original Commentary article, again closely contemporary and with numerous comments, and finally a short article and many comments by observant Jewish reader-commenters at www.jewschool.com.