# Trump Signs New ‘Lindsey Graham’ Law Tightening Sanctions on Russia and Iran

*Saturday, September 19, 2026 at 12:05 PM UTC — Hamer Intelligence Services Desk*

**Published**: 2026-09-19T12:05:41.084Z (2h ago)
**Category**: geopolitics | **Region**: Global
**Importance**: 9/10
**Sources**: OSINT
**Permalink**: https://hamerintel.com/data/articles/18290.md
**Source**: https://hamerintel.com/summaries

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**Deck**: U.S. President Donald Trump has signed a law informally named after Senator Lindsey Graham that adds new sanctions on Russian leaders, banks and energy and defense firms, targets Russia’s shadow oil fleet, and authorizes tariffs of up to 100% on goods from major buyers of Russian crude.

President Donald Trump has approved a new round of economic pressure on Moscow and Tehran, signing into law a sanctions package that widens U.S. tools against both countries.

The measure, informally named after Senator Lindsey Graham, was signed on the night of 18 September. Its key provisions include new sanctions on Russian President Vladimir Putin, oligarchs, banks, and companies in the energy and defense sectors. It also targets the so-called “shadow fleet” of oil tankers that move Russian crude outside mainstream Western insurance and tracking systems.

Another central feature of the law is a clause giving the U.S. administration authority to impose tariffs of up to 100% on goods from countries that are among the largest purchasers of Russian oil. That power is designed to put additional pressure on states that continue to buy significant volumes of Russian crude.

For Russian financial institutions and businesses, the package raises the risk of further isolation from dollar-based services and international markets. Banks and firms that help arrange or finance shipments via opaque tanker networks now face a higher chance of being singled out.

Iran is also named as a target of the law, though detailed public reporting on the specific Iran-related measures is limited. The framing of the package as an Iran–Russia sanctions tool, rather than a Russia-only measure, underscores a U.S. view that the two governments are linked in a broader confrontation.

Russian officials have condemned the tightening of sanctions. Dmitry Medvedev has argued that the United States understands only the language of direct military deterrence and has said that this is how Russia should respond to the new law.

How Washington uses its new tariff authority, which Russian and Iranian entities are designated first, and whether there is any knock-on response from Moscow will determine how far this law reshapes trade and financial ties with both countries.