Trump says he'll declare the US opioid crisis a national emergency 'next week'

• Trump teases 'major announcement, probably next week, on the drug crisis'
• Says he could revisit Tom Marino nomination as drug czar

Donald Trump on Monday teased a long-awaited announcement on tackling the crisis of opioid addiction. He also suggested his choice to lead to lead the National Office of Drug Control Policy might be under review.

Related: West Virginians struggle for answers in America's worst hit opioid epidemic state