John Kerry

He actually had distant relatives who perished in the Holocaust - something he didn't know until around 2003 when the Boston Globe researched his father's family, finding that Kerry's grandparents had been Jewish and had converted and changed the family name before immigrating to the US where Kerry's father was born.

This is something that likely will give him at least a small amount of additional credibility with Israel on a personal level. He was the first US Senator to visit Gaza - which is something that makes him more acceptable than most Americans to the Palestinians. Of course, the likelihood of improving the situation there - much less real peace - rests with the two countries wanting that more than what they perceive is the advantage of the status quo.