A possible deal would roll back a portion of the $250 billion in U.S. tariffs on Chinese goods.

Treasury Secretary Steven Mnuchin said on Sunday that trade talks between the United States and China were entering a critical point as an American delegation h

"When the world’s two largest economies agree to settle disputes between themselves, the World Trade Organization is instantly sidelined."

Lighthizer, Mnuchin set to return to Beijing on Tuesday with both sides aiming for draft deal after subsequent talks in Washington.