Going back to the Eisenhower Days and Little Rock School situation - YES.
He can call out the National Guard and Nationalize it and direct it to maintain order.
The problem is, the California National Guard is probably infiltrated with fruitcakes from San Francisco, Illegals from Mexico and drug heads. He would need to nationalize the Alabama or Texas National Guard and send IT over there.
Not to discount what you are saying but any member of the National Guard can be called to duty at any time. In effect they are part of the military and have to abide by the laws and regulations of the military. This means they can be court martialed, sent to Leavenworth to make big rocks into smaller rocks if found guilty. That includes random drug testing at any time. Some people think that just because you are in the Guard its a cake walk. You still go to full basic training as a regular soldier does. Just because you have duty one weekend a month does not mean you are only covered on that weekend by the rules and regulations set for the by the military. The National Guard sent a lot of individuals to Iraq and Afghanistan. Don’t discount them so easily.