Lindsey Graham knew how to speak Trump's language like few others, and there is no obvious successor among Republican hawks with his charisma and access. His death leaves an open question: Who will take up the mantle as the most effective conduit for Netanyahu's messages to Trump?

The US Republican senator died of a sudden illness, his office said. He was 71.

US Republican senator Lindsey Graham, a key ally of Donald Trump, a staunch Israel supporter, and a foreign policy hawk who advocated for military intervention against Iran, has…