The Trump administration has imposed tariffs of 25% on over $200 billion of Chinese goods, even as trade talks between the U.S. and China continue in Washington, D.C. The new, tougher tariffs went into effect just after midnight Eastern Time today, prompting Chinese trade officials to promise immediate countermeasures against U.S. exports. At the White House, President Trump claimed China undermined recent trade talks by seeking a renegotiation.

President Donald Trump: “I did get last night a very beautiful letter from President Xi: ’Let’s work together. Let’s see if we can get something done.’ But they renegotiated the deal. I mean, they took, whether it’s intellectual property theft. They took many, many parts of that deal, and they renegotiated. You can’t do that.”

Trump says he’s preparing to order tariffs on virtually all Chinese imports—some $540 billion worth of products brought into the U.S. each year. Talks between the U.S. trade officials and their Chinese counterparts are set to continue today in Washington.