A bill proposing a significant strengthening of anti-Russian sanctions has been submitted to the U.S. Senate. It was promoted by Republican Lindsey Graham. — Ukrinform.

The bill would impose tariffs of 100% on Russia's top oil and gas importers

The bill would impose tariffs of up to 100% on the top five buyers of Russian oil or natural gas, while granting the U.S. president authority to waive the sanctions "upon a…