For starters, you would arm everyone. At least, you would remove all un-Constitutional, and un-ethical, restrictions on invidividual arms carry. Anyone could carry anything they wanted anywhere they wanted. Including airplanes.
Private property owners, including "public" business owners, set the rules for carry on their property.
Once you'd gotten the liberals revived from that conniption causing issue, then you'd go on to kill the welfare state and impose an NRST with no exepmtions. This would allow business to flourish as well as reducing the incentive for illegals to want to come here. It'd also kill a lot of the power the government has to make and regulate business deals. Most of these tin-pot dictators would get strung up within a few short months as moneyed US based interests buy them out or pay for their over-throw so we can get our capitalistic hands on their un-tapped resources.
For starters, you would arm everyone.
Now that's what I call REAL homeland security!