 The use of "may" and "admissible" in the passage below led to confusion for the lower courts.Justice Anthony Kennedy in dissent in "Zadvydas" had objected that

The majority's unanchored interpretation ignores another indication that the Attorney General's detention discretion was not limited to this truncated period.Section 1231(a)(6) permits continued detention not only of removable aliens but also of "inadmissible" aliens, for instance those stopped at the border before entry.