In a major policy movement carrying global diplomatic and economic ramifications, US President Donald Trump officially signed into law the "Lindsey O. Graham Sanctioning Russia and Iran Act of 2026" after it cleared both houses of Congress with strong bipartisan support. Named in honor of the late Republican senator who co-authored the measure alongside Democratic Senator Richard Blumenthal, the sweeping federal legislation imposes direct sanctions on foreign financial institutions, defense enterprises, and sovereign state leaders associated with ongoing Eurasian conflicts. A central clause of the new law equips the White House with discretionary executive authority to impose tariffs reaching up to 100 percent against major international buyers purchasing energy products from targeted nations, directly impacting strategic global trade partners including India and China. Ukrainian President Volodymyr Zelenskyy welcomed the signing as a decisive economic pressure tool, while Congressional leaders highlighted that starving adversary trade routes of liquid capital remains essential to forcing peace negotiations. However, opposition lawmakers and international foreign policy analysts warned that executing maximum secondary tariff penalties risks raising consumer costs domestically and triggering widespread retaliation across international commodity markets. As federal agencies move toward setting operational compliance guidelines, sovereign trade ministries across Asia and Europe are evaluating countermeasures to defend national energy security and insulate domestic industries from global economic friction. Following swift congressional clearance earlier in the week, U.S. President Donald Trump officially signed H.R. 5334, the Lindsey O. Graham Sanctioning Russia and Iran Act of 2026, into law on Friday, September 18. The enactment establishes durable statutory authority for the executive branch to levy ad valorem tariffs of up to 100% on foreign nations continuing to import large volumes of Russian crude oil and natural gas. Named in memory of the late South Carolina Republican Senator who championed the bill prior to his passing in July, the legislation marks the most expansive U.S. economic authority enacted to curtail Moscow's energy revenues since 2024. Under the enacted statutory framework, the law mandates that the United States Trade Representative (USTR) conduct periodic global energy reviews every 180 days. The discretionary tariff mechanism allows the administration to target the five largest foreign importers by volume of seaborne Russian crude and natural gas. Foreign markets heavily reliant on Russian crude—most notably China and India—fall directly within the review framework, alongside key European importers. However, the statute explicitly incorporates national security waiver provisions, permitting the White House to suspend or adjust tariff rates upon certifying to Congress that doing so serves U.S. national interests. Beyond secondary trade tariffs, the Graham Act Codifies blocking sanctions targeting Russian military commanders, state financial institutions, and logistics networks associated with Russia's maritime "shadow fleet". It also extends the statutory scope of the Iran Sanctions Act for an additional five years. Ukrainian President Volodymyr Zelenskyy welcomed the signing as a decisive tool to squeeze war funding, whereas affected nations, including India’s Ministry of External Affairs, reiterated that they will take all necessary measures to protect national trade interests and maintain sovereign energy security for their domestic populations.