Donors say the trend toward Republicans among wealthy, hawkish contributors is at least partly responsible for inspiring stronger support for Israel among party lawmakers who already had pro-Israel views.

“Absolutely, it is a factor,” said Marc Felgoise, who manages the Philadelphia Israel Network, a campaign fund-raising group, and whose own contributions have shifted to Republicans, though he still supports many Democrats. “They are trying to cater to people who are ultimately going to support them.”…

The shift has also meant the Republican Party today accepts little dissent on the topic of Israel, said Scott McConnell, a founding editor of The American Conservative, an outcome he believes is in part driven by the demands of financial supporters.

“Republicans interested in foreign policy used to understand that it was not in America’s national interest to ignore entirely Arab claims against Israel,” he said. “Now, there is a fanatical feeling of one-sidedness.”