More likely they see that Clinton is likely to lose, and are trying to make it in before that happens, and border crossing begins to become properly regulated. Remember, under Obama, the ICE has essentially been working under “stand down” rules of engagement.
Trump should send the active duty military to the border on January 20th, as soon as he lowers his arm after taking the oath of office.
And then use force to prevent any more illegals from coming in, and round up the ones who already did.