U.S. Sen. Lindsey Graham, one of President Donald Trump’s closest allies in Congress who traveled the globe to advocate for a more aggressive U.S. foreign policy, died Saturday evening after a “brief and sudden illness,” his office said in a statement posted on social media. He was 71. His office did not provide did not provide any additional details about the South Carolina Republican and said his family “appreciates prayers at this time and asks for privacy during this incredibly difficult…