The US Supreme Court has issued three decisions but did not decide the closely watched dispute over the legality of President Donald Trump's global tariffs.
The court on Tuesday did not announce the next date when it will issue rulings.
It does not announce in advance which rulings will be released on a given date.
US Trade Representative Jamieson Greer said on Tuesday that Trump's tariffs under the International Emergency Economic Powers Act are the "most appropriate" remedies to the trade situations that the United States faces.
Greer told a forum in Davos, Switzerland that there were other options to impose new tariffs if the Supreme Court were to strike down the IEEPA tariffs but declined to discuss them.
"The president chose to use IEEPA because it is the most appropriate to the situations we're facing," Greer said.
"For the emergency like the trade deficit, for emergencies related to national security, it's the most appropriate. So if we aren't allowed to use that, there are other tools we can use, certainly, but IEEPA is the most appropriate."
