White House Economic Adviser Larry Kudlow will remain at Walter Reed National Military Medical Center as he continues recovery from a heart attack that occurred on Monday.

Press secretary Sarah Huckabee Sanders announced Tuesday that Kudlow’s extended hospital stay was a “standard precaution."

“National Economic Council Director and Assistant to the President Larry Kudlow is expected to remain at Walter Reed National Military Medical Center as a standard precaution after experiencing what his doctors say, was a very mild heart attack yesterday,” she said in a statement.

“His doctors expect Larry will make a full and speedy recovery. We look forward to seeing him back at work soon. Larry and his wife Judy wanted to express heartfelt appreciation for all of the thoughts, prayers, and well-wishes,” Sanders continued.

President Donald Trump on Monday tweeted about Kudlow’s heart attack shortly before he was set to meet with North Korean leader Kim Jong Un.

“Our Great Larry Kudlow, who has been working so hard on trade and the economy, has just suffered a heart attack,” he said.

Kudlow’s wife, Judy Kudlow, also spoke about her husband’s treatment on Monday, saying that “he’s doing fine,” and that doctors at the medical center were “fabulous.”

Prior to his heart attack, Kudlow attended the G-7 Summit on Saturday and made headlines for his comments concerning Canadian Prime Minister Justin Trudeau.

“He holds a press conference and he said the U.S. is insulting. He said that Canada has to stand up for itself. He says that we are the problem with tariffs. The non-factual part of this is — they have enormous tariffs,” Kudlow said.

“Here’s the thing,” he continued. “He really kind of stabbed us in the back.”

Doctors expect Kudlow to make a full recovery.