'Madman' Kim Jong-un will be tested like never before: Donald Trump

Kim Jong Un of North Korea, who is obviously a madman who doesn't mind starving or killing his people: Trump

US President Donald Trump on Friday warned "madman" North Korean leader Kim Jong-Un that he would be "tested," the latest in an exchange of insults between the two.

"Kim Jong Un of North Korea, who is obviously a madman who doesn't mind starving or killing his people, will be tested like never before!" Trump tweeted.