And it's not just party ID. At the presidential level, there has been an uptick in support for Republican candidates among American Jews, who have made up anywhere from 2 to 4 percent of the American electorate going back to 2000.
In 2000, George W. Bush got 19 percent of the Jewish vote. In 2012, Mitt Romney got 30 percent.
President Obama's difficult relationship with Israeli Prime Minister Benjamin Netanyahu has not helped Democrats. A recent poll by a left-leaning group showed that among Jewish voters, Netanyahu has a higher favorability rating than Obama — 53 percent to 48 percent. This summer, tensions ran especially high as the Israeli government launched a military action in Gaza, with the Obama administration calling for a series of humanitarian cease-fires.
At the electoral level, in 2011, Republican businessman Bob Turner beat a prominent Democrat in the race to fill Anthony Weiner's congressional seat in New York City, in one of the most heavily Jewish districts in the country. He focused heavily on Israel, gaining the backing of former New York City mayor Ed Koch, who urged voters to send a message to Obama.