His words aren't backed up by the facts. That's the Obama administration's response to the denials by Syrian President Bashar Assad that his military used chemical weapons in a deadly attack near Damascus last month.

Syrian President Bashar Assad (YouTube)

National Security Council spokeswoman Bernadette Meehan says it's no surprise that someone who would kill hundreds of children with poison gas would also lie about it.

Assad, in an interview broadcast on CBS' "This Morning," said his troops didn't use chemical weapons in an attack last month near Damascus. He also warned that there will be consequences for the United States if it launches a military strike against him.

Secretary of State John Kerry, speaking today in London, said he'd be confident going into any courtroom with the evidence gathered by the United States against Syria's government.

Amid continued reluctance by members of Congress to go along with a military strike in Syria, President Barack Obama continues his effort to convince lawmakers and the American public that it's the right thing to do. Obama has interviews scheduled on six TV news broadcasts this evening, and he's again sent his senior foreign policy team to lobby Congress.

US says 14 more nations join statement on Syria

WASHINGTON (AP) — The White House says 14 more nations have signed on to a statement blaming Syrian President Bashar Assad's government for a chemical weapons attack and calling for a strong international response.

That means the list has grown to 25 from the 11 — including the U.S. — who initially signed on. The statement was unveiled Friday at the Group of 20 economic summit in St. Petersburg, Russia.

Among the new nations announcing support are Germany, Denmark, Morocco, Qatar and the United Arab Emirates, Estonia, Croatia, Hungary, Kosovo, Honduras, Romania, Latvia, Albania and Lithuania are also listed.

The statement doesn't explicitly call for military action against Syria, as President Barack Obama is advocating. But administration officials say it's an implicit endorsement because the U.S. is publicly discussing a potential military strike.