Obama admin has suing Arizona over illegal immigration as an option.

They really want that Latino vote over border security.

So what did President Obama mean when -- responding on Friday to Arizona's new immigration law -- he said that he'd "instructed members of my administration to closely monitor the situation and examine the civil rights and other implications of this legislation"?

An Obama administration official says it means that officials from the Justice Department and Department of Homeland Security are looking to see if there are any actions they should take in response to the law -- and "that could mean suing to block the law, but we're a long way from knowing if that's a viable route yet."