President Donald Trump said he might raise U.S. tariffs on Chinese goods beyond 25 per cent if trade negotiations with Beijing remain stalled.

Trump told reporters that the new 10 per cent tariff he announced Thursday for $300 billion in Chinese imports beginning Sept. 1 would be imposed for a short term and could go up or down after that. He didn’t elaborate.

Chinese President Xi Jinping isn’t moving fast enough to resolve the trade war with the U.S., Trump told reporters as he departed the White House for a campaign rally in Cincinnati. “Frankly he is not going fast enough,” Trump said.

Trump also said he’s “not concerned at all” that stock markets dropped after his announcement of the new tariffs. “I expected that a little bit.”