"I thought one of the biggest opportunities was for the U.S. and the EU to join together - the biggest market in the world, the two combined - and use that leverage in negotiations with the Chinese," Pelosi told an audience at the London School of Economics.

"So I wasn't pleased when the President put tariffs on the EU because you kind of started to weaken that strength vis-a-vis China."

(Reporting by Marc Jones; Editing by Toby Chopra)