WASHINGTON (Reuters) - U.S. Treasury Secretary Steven Mnuchin said on Monday significant issues remained in talks between the United States, Mexico and Canada to renegotiate the North American Free Trade Agreement(NAFTA).

FILE PHOTO: U.S. Treasury Secretary Steven Mnuchin (R) is seen as he and a U.S. delegation for trade talks with China arrive at a hotel in Beijing, China May 3, 2018. REUTERS/Jason Lee/File Photo

“There are still some very significant, open issues,” Mnuchin said in an interview on CNBC. He said the Trump administration remained focused on crafting a new NAFTA deal that would require congressional approval, but that Trump could consider a possible so-called ‘skinny deal’ that would not.

Reporting by Susan Heavey and Jason Lange

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