South Korea and the U.S. are launching negotiations on defense cost sharing... as early as next week in Seoul.<br />A South Korean military source confirmed today... that James DeHart of the U.S. State Department will lead the U.S. delegation.<br />Seoul is still carrying out internal procedures to select its chief negotiator.<br />President Trump has been trying to pressure South Korea to shoulder more costs.<br />Under this year's Special Measures Agreement, a defense cost-sharing deal that expires at the end of the year, Seoul had agreed to pay nearly 875-million U.S. dollars, an increase of more than eight-percent from the previous year.<br />