U.S. Trade Representative Robert Lightizer said on Friday that he would be surprised if the meeting between President Donald Trump and China’s Xi Jinping were not a success.

Speaking to reporters after the signing of the trade pact between the United States, Canada, and Mexico, Lighthizer also predicted there would be a “positive feel” on both sides after the dinner between the leaders, which is scheduled for Saturday night, according to several reports from reporters at the Group of 20 summit in Buenos Aires, Argentina.

“In the wake of signing the United States–Mexico–Canada deal, what can anyone expect from a dinner party tomorrow? Can a deal of any substance come out of a dinner event?” asked Fox Business Network’s Liz Claman, anchor of “Countdown to the Closing Bell.”

“I would be very surprised if the dinner wasn’t a success,” Lighthizer said. “I absolutely feel there will be positive feeling at the end of the dinner.”

Lighthizer added that any agreement would be “entirely up to” Trump and Xi and that there would be discussion of “very serious issues,” according to reports.