Senate powerhouse Lindsey Graham has died. Here's how he influenced corporate taxes, foreign trade, and defense.

Sen. Lindsey Graham waits to begin a hearing on Capitol Hill in Washington, DC. Pool/Getty Images Sen. Lindsey Graham died on Sunday at the age of 71. The senator's office confirmed his death after a "sudden illness." Graham was key in shaping Trump-era policies like lower corporate tax rates and tariffs. Republican lawmaker Lindsey Graham, who died on Saturday at the age of 71, had a major influence on corporate tax rates, tariff policies, and defense spending. Graham's office said in a statement on Sunday that the four-term senator died after a "brief and sudden" illness. Graham, an ally of President Donald Trump, had just returned from a trip to Kyiv, where he had met with Ukrainian President Volodymyr Zelenskyy . In his 23 years in the Senate, Graham helped shape a protectionist, national-security-driven approach to trade and business-friendly policies that lowered corporate tax rates .