NASHVILLE, Tenn. (AP) — Tennessee is joining a multistate lawsuit seeking to halt President Barack Obama's executive action on immigration, Attorney General Herbert Slatery announced Monday.Slatery notified the parties in the lawsuit that Tennessee will become the 25th state to join the legal challenge filed in federal court in Texas, saying the state "cannot sit on the sidelines of this case, when unlawful directives of this magnitude grant lawful presence and other rights like work permits to such a large number.""Asking a court to review this issue is the prudent choice, especially when state resources will be taxed under the directives to provide benefits like unemployment compensation and health care," Slatery said in a statement.Obama traveled to Nashville earlier this month to tout his decision to extend deportation relief and work permits to 4 million immigrants in the U.S.