Larry Kudlow, President Trump's top economic advisor, suffers heart attack

WASHINGTON, DC - JUNE 06: White House National Economic Council Director Larry Kudlow calls on reporters during a briefing about the upcoming G7 meetings in the Brady Press Briefing Room at the White House (Photo by Chip Somodevilla/Getty Images)

President Trump tweeted on Monday night that his top economic advisor, Larry Kudlow, has suffered a heart attack.

Kudlow, 70, has been hospitalized at Walter Reed medical center.

The president announced the medical emergency from Singapore, where he and North Korean leader Kim Jong Un are set to meet at a historic nuclear summit.