Specifically, they are implied with the whole "call up the National Guard under the Insurrection Act and send them out to kick doors in looking for illegals, especially in liberal strongholds." I am sure they will act strictly under the color of the law and adhere only to these reasonable, publicly stated goals.
On an unrelated note, TM 31-210 is an informative, engaging, and entertaining coffee table read, if anyone is looking for that sort of thing.