WASHINGTON (BLOOMBERG) - President Donald Trump's top economic adviser, Mr Larry Kudlow, is expected to recover fully after suffering a mild heart attack in the US shortly before the President's nuclear summit with North Korean leader Kim Jong Un, a White House aide said on Tuesday (June 12).

"The great @larry-kudlow is expected to make a full and speedy recovery after a very mild heart attack. Larry is one of the smartest, most endearing, funniest people I know. 'Hogie' is praying for you!" White House spokesman Hogan Gidley said in a Twitter posting.

Mr Trump announced Mr Kudlow's heart attack in a tweet from Singapore shortly before meeting with Mr Kim.

White House Press Secretary Sarah Huckabee Sanders said in a statement that Mr Kudlow experienced "a very mild heart attack" and had been admitted to Walter Reed Military Medical Centre on Monday.

Mr Kudlow's wife, Judy, said he was doing "fine", Mr Robert Costa, a Washington Post reporter, said in a Twitter posting.

In another tweet, Mr Costa said Mr Kudlow was "up and talking" and had spoken by phone with conservative economist Art Laffer, citing two people close to Mr Kudlow.

Mr Kudlow, a former economic adviser to President Ronald Reagan and a Wall Street economist, has played a key role in ongoing trade talks, including disputes with China that led Mr Trump to threaten tariffs.

Mr Kudlow, along with Treasury Secretary Steven Mnuchin, is known as an advocate within the administration of more robust trade in opposition to more protectionist views advocated by trade adviser Peter Navarro.

He co-authored an editorial arguing tariffs are a tax on consumers earlier this year before Mr Trump chose him as director of the White House National Economic Council. Yet Mr Kudlow has defended Mr Trump's trade policies in public since his appointment.

Mr Kudlow accompanied Mr Trump this weekend to the annual G-7 meeting in Quebec, where the President traded barbs with the leaders of Canada, Germany and France over trade.

On Sunday, Mr Kudlow said on CNN's State of the Union that Canadian Prime Minister Justin Trudeau "really kind of stabbed us in the back" after criticising US tariffs on imported steel and aluminium and Mr Trump's positions on trade in a news conference following the summit.

For five years before his White House appointment in March, Mr Kudlow hosted a CNBC show on business and politics.

During Mr Reagan's first term, he was associate director for economics and planning in the White House's Office of Management and Budget.

He has also worked at the Federal Reserve Bank of New York.