Nope because US will still have presence around Asia. South Koreans are strong enough to defend themselves now. They are one of the finiest in Asia and North Koreans have nothing.
So they said. Artillery attacks and the sinking of a South Korean ship. As well as nukes. Something tells me NK is still prepared while South Korea is still trying accommodate them like a lost brother not willing to fight even if that NK brother is pointing a gun at him.