Larry Kudlow, a former CNBC host and President Trump’s chief economic adviser, suffered a heart attack Monday, the president tweeted.

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

“He is now in Walter Reed Medical Center.”

The president was in Singapore preparing for his meeting with North Korean leader Kim Jong Un when he put out the statement.

Kudlow’s wife Judy told The Washington Post that her husband was “doing fine.”

The White House later released a statement that said the 70 year old experienced “what his doctors say, was a very mild heart attack.”

“Larry is currently in good condition at Walter Reed National Military Medical Center and his doctors expect he will make a full and speedy recovery,” read a statement from Press Secretary Sarah Sanders.

Kudlow made news over the weekend when he said Canadian Prime Minister Justin Trudeau “stabbed us in the back.”

A longtime fixture on the business news network CNBC, Kudlow previously served in the Reagan administration.

He succeeded Gary Cohn, a former Goldman Sachs executive who left the post in a dispute over Trump’s decision to impose tariffs on imported steel and aluminum.