Well, it would help the Dems bring the un-employment figures up higher, and put more people at the mercy of the Government. The National Guard has already been deployed to Iraq and Afghanistan countless times. Add border duty, and employers will start letting the troops go.
I remember when I returned to the Railroad, after my enlistment in the Navy, that they said that there was a time constraint on holding jobs for military personel, I skinned it back in with like 29 days to spare.