NEW : U.S. governor criticizes government lawsuit against immigration law . Key Americans says lawsuit shows `` contempt '' for Republican . CNN says Arizona improperly preempts federal law . `` The State of Arizona has crossed this constitutional line . '' Law requires police to question people suspected of being in Arizona illegally .
NEW : U.S. governor criticizes government lawsuit against immigration law . Key Americans says lawsuit shows `` contempt '' for Republican . CNN says Arizona improperly preempts federal law . Law requires police to question people suspected of being in Arizona illegally .