In news today, a South Korean ship has been sunk.  South Korean officials suspect North Korea of torpedoing their ship.  

In return, the South Korean navy has fired on "unidentified ships in the direction of North Korea."

Remember, at the end of the Korean War the U.S. signed a cease-fire/ armistice agreement with North Korea.  However, that agreement was never followed up with a formal peace treaty so, technically speaking, we're still at war with them.  That's why, to this day, large numbers of troops are stationed on both sides of the Demilitarized Zone between North and South Korea.

In the Korean War Red China sided with the Soviets in backing North Korea whereas the U.S. backed South Korea. 

With China holding so much U.S. debt, and given our president's history of dealing with our enemies while humiliating our allies, what will be the U.S. response if/when tensions between North and South Korea escalate?

Our President is on record bowing to despots, appeasing terrorist countries, and insulting our allies.  If the situation in the Yellow Sea deteriorates, there's little doubt he would  side with China.  That would likely mean the end of an Asian democracy whose very existence was at the expense of many American lives.  Hopefully, for once, our President will remember those brave Americans before blindly abandoning our ally to a renewed conflict with the North.