/WASHINGTON, September 19. /TASS/. U.S. President Donald Trump has signed a congressional bill designed to expand sanctions against Russia, the White House said in a statement released on Friday.

According to the statement, the U.S. leader signed the bill on September 18. The legislation "authorizes and expands statutory sanctions, tariffs, and prohibitions on Russia, and extends existing sanctions on Iran." Thus, the bill has officially become law.

The US Congress had previously approved the initiative, which mandates restrictions against Russia's top political and military leadership, state-owned companies, and secondary sanctions against Moscow's trading partners. The legislation was primarily authored by US Senator Lindsey Graham (designated as a terrorist and extremist in Russia), who passed away on July 11.

According to the text of the bill, the US may impose 100% tariffs on nations that are major buyers of Russian oil and gas. Furthermore, the legislation includes measures to tighten sanctions against Iran.