U.S. President Donald Trump celebrated second-quarter GDP growth of 4.1% by offering assurances that the current rate of expansion can continue.

"These numbers are very, very sustainable," Trump said during an appearance at the White House. "This isn't a one-time shot."

Trump added that he thought the economy would do "extraordinarily well" in the next quarter, without offering a specific estimate.

"I think it's going to be outstanding," he said. "I won't go too strong because then if it's not quite as good, you'll not let me forget it."

Trump highlighted the roughly $50 billion reduction to the trade deficit as a significant achievement, adding that it is "very dear to my heart."

Kevin Hassett, the chair of the Council of Economic Advisers, said the figures prove the administration's aggressive stance on trade is working.

"The $50 billion reduction in the trade deficit proves that if you stand up for America's workers, and let our allies know that deals that aren't reciprocal are unacceptable, then you can make a lot of progress," Hassett said.

National Economic Council Director Larry Kudlow highlighted increases in business investment and said the continuation of that investment will provide workers with larger paychecks.

"Why do I talk about business investment?" Kudlow said. "Well, that's the key to productivity, which is the key to growth, which is the key to rising, real wages and very strong jobs."