My other question is: Would this open the door to democrats peeling off a number of evangelicals if they ran a jewish president who stressed the importance of israel (think of someone like Berman)? I've always thought it would be clever for the dems to run a jewish candidate because it would guilt many evangelicals into voting democrat for fear of being labeled antisemitic.
You'd probably lose more than you'd gain. Several groups in your big tent would have many many of it's rank and file staying home on election day I'm guessing. These people wouldn't want to be labeled anti-Semitic either (even though they obviously would be).