Seattle City Council is considering emergency legislation to block the establishment of new or expanded jails and detention centers in King County. The announcement was made with support from regional leaders, including King County Councilmember Teresa Mosqueda, Port of Seattle Commissioner Toshiko Hasegawa, and SeaTac Deputy Mayor Senayet Negusse. The proposed legislation responds to potential moves by the Department of Homeland Security (DHS) to increase the number of Immigration and Customs E