What was said

For years, we have been trying to get China and Russia to do any sanctions on Iran. Never, never, never.

— Representative Nancy Pelosi, Democrat of California, at the Capitol on Thursday.

the facts

This is false.

China and Russia, as permanent members of the United Nations Security Council, voted to impose sanctions against Iran in 2006, 2007, 2008 and 2010. (Ms. Pelosi even commended the 2010 vote in a news release.)

The Security Council resolutions during those years embargoed Iran’s nuclear material and equipment, and arms sales. They also froze the financial assets of individuals linked to Iran’s nuclear program.

“The Russians and Chinese did support us in four rounds of sanctions. That was something,” said Richard Nephew, a sanctions expert and former State Department official during the Obama administration.

Though Russia and China were willing to join United Nations sanctions against Iran, Mr. Nephew said the two countries were reluctant — or even “very hostile” — when it came to enforcing penalties similar to those imposed on Tehran’s oil and financial sectors by the United States, the European Union and other Asian countries.