Trump: North Korea 'will regret it fast' if acts against US ally

President Donald Trump said North Korean leader Kim Jong Un "will regret it fast" if he continues his threats to U.S. territories and allies, in another warning that the U.S. is willing to act swiftly against the nuclear-armed nation.In remarks to reporters, Trump issued the threat directly at Kim, who is also known for his bellicose rhetoric, and all but drew a red line that would trigger swift U.S. action."If he utters one threat in the form of an overt threat — which by the way he has b