President Trump is expected to talk to the South Korean president Monday morning following North Korea’s test of a nuclear device over the weekend.

The phone call comes as South Korea began conducting live-fire military exercises after its northern neighbor detonated a nuclear device Sunday — the regime’s sixth and most powerful.

Complicating the escalating tensions created by North Korean President Kim Jong Un’s regime on the Korean peninsula is that Trump is thinking of withdrawing from a free trade agreement with South Korea.

On Sunday, Trump also lashed out at South Korea for President Moon Jai In’s handling of negotiations over North Korea’s weapons programs, accusing him of appeasing Kim’s reclusive regime.

​”​South Korea is finding, as I have told them, that their talk of appeasement with North Korea will not work, they only understand one thing!​,” Trump wrote on Twitter on Sunday.​