The Bush administration argued on Monday that the government can indefinitely jail immigrants in the United States and prevent them from ever challenging their detention in civilian courts. The Justice Department is claiming that the recently signed Military Commissions Act applies not only to detainees in Guantanamo Bay but also to any foreigner detained in the United States on suspicion of terrorism. Attorney Jonathan Hafetz said this means any noncitizen can be whisked off at night and put in detention. The Justice Department also claimed on Monday that hundreds of lawsuits by prisoners at Guantanamo should be thrown out because they no longer have the right to challenge their detentions in civilian courts.