Probably because Obama is a expert in constitutional law & stuff!
According to the opinion by Judge Arthur Schwab, the president’s policy goes “beyond prosecutorial discretion” in that it provides a relatively rigid framework for considering applications for deferred action, thus obviating any meaningful case-by-case determination as prosecutorial discretion requires, and provides substantive rights to applicable individuals. As a consequence, Schwab concluded, the action exceeds the scope of executive authority.
There are dozens more of these suits.
According to the opinion by Judge Arthur Schwab, the president’s policy goes “beyond prosecutorial discretion” in that it provides a relatively rigid framework for considering applications for deferred action, thus obviating any meaningful case-by-case determination as prosecutorial discretion requires, and provides substantive rights to applicable individuals. As a consequence, Schwab concluded, the action exceeds the scope of executive authority.
There are dozens more of these suits.