He shouldnt go anywhere N Korea...and South Korea is near...the capital, which he will visit, is only 25 miles from the border. This is like waving a raw steak at a bear. Not the brightest move.
This is a real Beau Gest—a bold move that just might work—If Kim tries anything—it would be war at its worst. Killing the president would be a reason to declare war that even the Democrats would be forced to support. Maybe he will ask for a meet and settle things? Worth a shot.