SEOUL, South Korea (AP) — Last year was a disaster for North Korean leader Kim Jong Un. He helplessly watched his country's already battered economy decay further amid pandemic border closures while brooding over the collapse of made-for-TV summits with former President Donald Trump that failed to lift crippling sanctions from his country. Now he must start all over again with President Joe Biden, who has previously called Kim a “thug” and accused Trump of chasing spectacles instead of meaningful reductions of Kim’s nuclear arsenal. While Kim has vowed to strengthen his nuclear weapons program in recent political speeches, he also tried to give Biden an opening by saying that the fate of their relations depends on whether Washington discards what he calls hostile U.S.