President Donald Trump took to social media before meeting with South Korean President Lee Jae Myung on Monday to threaten not to do business with Seoul because of a “Purge or Revolution” that he claimed was taking place in the country. But any prospect of a hostile Oval Office meeting evaporated after Lee heaped praise onto the U.S. president — lauding the decor, beseeching Trump to continue to help with Korean peace efforts and even suggesting a Trump Tower in North Korea.