Secure the American/Mexican Border
This is the main place that drugs and illegal aliens are entering the United States. It diverts local law enforcement from performing their normal duties, costing the taxpayer millions of dollars. Murder rates are exploding on these boarder towns, putting American citizens at a high risk of being killed.
By ending the wars in the Middle East, we would now have ample military personnel to help patrol the border. The National Guard, no longer being expected to be be sent for overseas duty would be used. The regular military could use some of their training at the border. Various types of surveillance aircraft and other military equipment would be available.
These would be used in conjunction and under the control of the Boarder Patrol which has to be given more authority when confronting what could be a potential treat to their lives. Laws for people coming into the United States illegally, has to be a deterrent so our current laws have to be examined and determined what more needs to be done.