[JURIST] The American Civil Liberties Union (ACLU) [advocacy website] announced Friday that it is filing a lawsuit [complaint, PDF] challenging a controversial Alabama law [HB 56 text; materials] that expands restrictions on undocumented immigrants. The lawsuit, filed in the US District Court for the Northern District of Alabama [official website], seeks injunctive relief to stop the law’s enforcement and a declaration that the entire law is unconstitutional. The law contains measures comparable to those passed in Arizona [JURIST report] last…