<span style="color: #222222;">Republican Senator, Lindsey Graham has said, the Saudi crown prince was responsible for Jamal Khashoggi's murder and must be dealt with as he threatened new sanctions. </span><br />'' <br />'' <span style="color: #222222;">Mr Graham, an influential ally of President Donald Trump, had previously said that Crown Prince Mohammed bin Salman was complicit in the grisly killing of Washington Post contributor Khashoggi in October. </span><br />'' <br />'' <span style="color: #222222;">Addressing a press conference in Ankara today he said he has concluded that the relationship between Saudi Arabia and the United States cannot move forward until crown prince has been dealt with. </span><br />'' <br />'' <span style="color: #222222;">Graham also threatened new sanctions against those suspected of involvement in the murder. </span><br />''