PORTLAND — Portland’s mayor has warned protesters camping at the office of the federal Immigration and Customs Enforcement agency to disband before they are removed by police. The Oregonian/OregonLive reports Portland Mayor Ted Wheeler said Monday that protesters should peacefully disengage because although he supports their cause he believes the demonstration is no longer sustainable. A camp sweep notice says people have until Tuesday to leave voluntarily. The notice says those who remain may face citation or arrest. The activists who have been protesting at a building leased by ICE since June 17 want to abolish ICE and end the Trump administration’s zero-tolerance immigration policy. The office closed temporarily because protesters blocked its entrances and several demonstrators were detained and charged with misdemeanors when federal police moved to reopen it.