Who is US Senator Lindsey Graham, and why has he threatened 100% tariffs on India? Graham is sponsoring a tough sanctions bill on Russia, which, if passed by Congress, would impose 500% tariffs on countries that purchase Russian oil, like China and India. US Senator Lindsey Graham warned countries including India, China, and Brazil for purchasing oil from Russia. He said under Donald Trump’s leadership, these countries may face heavy tariffs for buying oil from Russian President Vladimir Putin. Learn about Senator Lindsey Graham's journey from small town South Carolina to the U.S. Senate. Military veteran, conservative leader, and Trump ally. Lindsey Graham is a Republican senator from South Carolina and a former Air Force lawyer and prosecutor. He has served in the Senate since 2003 and chaired the Judiciary Committee from 2019 to 2021.