Top White House economic adviser Larry Kudlow, a staunch defender of US President Donald Trump's tough stance on global trade, is in a good condition at a Washington-area hospital, after suffering a heart attack.
Trump announced Kudlow's heart attack in a tweet sent minutes before he met with North Korean leader Kim Jong-un in Singapore.
"Our Great Larry Kudlow, who has been working so hard on trade and the economy, has just suffered a heart attack. He is now in Walter Reed Medical Center," Trump said.
Later, White House spokeswoman Sarah Sanders, who was travelling with the president, issued a statement that said Kudlow's doctors said he had a "very mild heart attack".
"Larry is currently in good condition ... and his doctors expect he will make a full and speedy recovery," she said.
The Walter Reed National Military Medical Center is in suburban Maryland.
A longtime television commentator, Kudlow, 70, was hired by Trump in March to replace Gary Cohn as director of the National Economic Council.
Kudlow joined the president at the Group of Seven summit in Quebec on Friday and Saturday. He did several media interviews on Sunday to vigorously defend Trump after the president's trade spat with summit host Canadian Prime Minister Justin Trudeau.
In an interview with CNN on Sunday, Kudlow said: "(Trudeau) really kind of stabbed us in the back."
Kudlow, a Republican who served as an economic adviser to former President Ronald Reagan in the 1980s and also worked on Wall Street, is an ardent advocate of "supply side" economic policies that focus on cutting taxes and reducing regulations.
He has acknowledged ups and downs in his life, having been addicted to drugs and alcohol before getting sober more than 20 years ago.
When he was a CNBC contributor before taking the White House job, Kudlow argued the metals tariffs Trump had announced would harm consumers. The month he was tapped for the White House job, he co-authored an article that argued such tariffs were akin to sanctions on the US itself.
At the White House, however, he has been one of the most visible and vocal of advisers arguing that the president is simply trying to fix a broken global trade system in which the US was not being treated fairly.