Sen. Lindsey Graham, a close ally of President Donald Trump, has died after a brief illness, according to his office. The South Carolina Republican was 71. Graham was known for advocating a strong U.S. foreign policy. He initially opposed Trump and ran against him for president in 2016, but later became a staunch supporter. Graham had just returned from Ukraine, where he'd meet with Ukrainian President Volodymyr Zelenskyy. Graham was known for advising Trump on matters such as Iran and Russia. Trump says Graham "sounded a little bit tired, but perfect,” when the senator called the president Saturday night after returning from his trip.