Lindsey Graham, a longtime US senator from South Carolina, died at the age of 71 on Saturday evening after a brief and sudden illness, his office confirmed in a post on X on Sunday.Lindsey Graham frequently made headlines for his controversial remarks on a range of issues. (REUTERS)A close ally of US President Donald Trump, Graham frequently made headlines for his controversial remarks on a range of issues.'Tariffs on India were a good example'In February this year, he claimed that India had reduced its purchases of Russian oil "dramatically", and argued that tariffs imposed by Trump on Delhi were a "good example" of how policy measures could influence countries' actions."Clearly, the pressure we're applying to (Russian President Vladimir) Putin to come to the peace table and stop massive attacks against Ukraine is not working. President Trump's idea of going after Putin's oil customers who prop up his war machine should be pursued with vigour by the US and Europe,” he wrote on X.'Kill Khamenei'In January this year, Graham called on Trump to kill Iran's then-Supreme Leader, Ayatollah Ali Khamenei.During an interview on Fox News's Sunday Morning Futures, Graham urged Trump to take direct action against Iran's leadership.“If I were you, Mr. President, I would kill the leadership that are killing the people. You’ve got to end this,” he said.‘Greenland is behind us’In February this year, Graham described Greenland as being "behind" the United States and said, "Who gives a s***" who owns the Danish territory.When Politico asked what he would say to his "friends from Europe" who were "nervous" about the controversy surrounding Greenland, Graham replied, "If you're nervous, have a beer, go see a doctor."“Greenland is behind us, but the goal is to get outcomes. Who gives a s*** who owns Greenland? I don’t,” Graham said on the sidelines of the Munich Security Conference in Germany on Friday.More details will be added to this story shortly.