WASHINGTON - US President Donald Trump said talks with North Korea in New York have been very positive and he is expecting the delegation from Pyongyang to travel to Washington on Friday to deliver a letter to him from leader Kim Jong Un."I look forward to seeing what's in the letter," Trump said as he left Joint Base Andrews for a trip to Houston. Asked if a deal was taking shape, Trump said: "I think it will be very positive. ... The meetings have been very positive."