A day after Secretary of State Rex Tillerson suggested that the United States maintains “lines of communications” with Kim Jong Un's regime, Trump wrote on Twitter that Tillerson is “wasting his time trying to negotiate with Little Rocket Man” — his nickname for Kim. Tillerson, on a visit to Beijing, told reporters Saturday that the State Department is “probing” through direct channels with the North whether Kim would be open to talks and under what conditions. Trump, who is spending the weekend at his Bedminster golf resort in New Jersey, has said repeatedly that he is open to military options. North Korean officials have suggested that Trump's threats amount to a declaration of war.