US President Donald Trump cast doubt on reaching a trade deal with Japan, a day after threatening higher tariffs on Japanese exports to the United States, claiming the country won’t buy American rice.

Japanese Prime Minister Shigeru Ishiba pushed back against the idea there has been little progress in negotiations with the US on a trade deal as a deadline looms for a 24% across-the-board tariff to take force.

Difficult talks with many nations cast doubt on next week’s deadline. “We can do whatever we want,” Trump said.