SEOUL, South Korea (AP) — South Korea and the United States struck a new deal Sunday that increases Seoul's contribution for the cost of the American military presence on its soil, overcoming previous failed negotiations that caused worries about their decades-long alliance.

South Korea last year provided about $830 million, covering roughly 40 percent of the cost of the deployment of 28,500 U.S. soldiers whose presence is meant to deter aggression from North Korea. President Donald Trump has pushed for South Korea to pay more.

On Sunday, chief negotiators from the two countries signed a new c...