NATO allies, Ukraine and Israel have paid tribute to U.S. Sen. Lindsey Graham as a friend and advocate of trans-Atlantic ties. Graham was a high-profile figure in global foreign policy both before and during the Trump era. Graham visited Ukraine just before his death and announced an agreement on sanctions against Russia. President Volodymyr Zelenskyy said Graham visited Ukraine 10 times during Russia's full-scale invasion. A one-time critic of Trump turned close ally, Graham drew tributes for his longtime commitment to NATO and trans-Atlantic friendship at a time when those ties have been under pressure.