Herman Cain looked startled when Chris Wallace of Fox News quizzed him about the Middle East. “Where do you stand on the right of return?” asked Wallace on his Sunday-morning show of May 22, referring to the idea that a peace agreement could allow Palestinian refugees to make claims on Israeli land. “The right of return? The right of return?” sputtered Cain, who is running for president as a Republican. Wallace prompted him again — “The Palestinian right of return” — but it didn’t help. “That is something that should be negotiated,” replied Cain. Then he repeated himself, which apparently …