North Korean leader Kim Jong-un had agreed to visit Seoul in late 2018 amid then warming inter-Korean ties, but the planned trip was abruptly canceled a day before its announcement apparently due to security concerns, a South Korean lawmaker said Tuesday. Rep. Youn Kun-young of the ruling Democratic Party, who at the time served as a key presidential aide in charge of state affairs planning and monitoring, said the two Koreas had agreed on Kim's trip to Seoul following then President Moon Jae -