A view of the construction site of the Yongin semiconductor cluster industrial complex in Yongin, Gyeonggi, on Jan. 20 [YONHAP] [NEWS ANALYSIS]   U.S. Commerce Secretary Howard Lutnick’s threat to hit foreign memory chipmakers — specifically Korea’s Samsung Electronics and SK hynix — with 100 percent tariffs unless they commit to building related facilities in the United States is widely viewed by industry sources as unrealistic.   High labor costs, a shor...