Tuesday is a big day in Washington DC, even by White House standards. Long-time Republican Senator Lindsay Graham's funeral is bringing the Ukrainian President Volodymyr Zelensky and Israeli Prime Minister Benjamin Netanyahu to town. They will separately meet with President Donald Trump at the White House to discuss two different wars: the war in Ukraine and the war in Iran.

The BBC's North America editor Sarah Smith previews the visit and explains the late senator's remarkable influence on the two conflicts.