Sen. Lindsey Graham (R-S.C.), who died suddenly Saturday, spent his final weeks laying the groundwork for an ambitious new push to normalize relations between Saudi Arabia and Israel, he told me in multiple conversations over the past several weeks. Why it matters: Graham was one of Washington's most influential and energetic foreign policy figures. He spent decades trying to shape America's role in the world and was still pursuing some of his biggest diplomatic ambitions in the final hours of…