Trump should call a "national emergency" and build a wall on the WHOLE US-Mexico border and have Army build the wall from the Army/DoD budget who Trump gave 700+ billion dollars in the early 2018 Omnibus.
Here is Democrat Adam Smith who now is the Chair of the Armed Services Committee in the House telling that Trump can call a "national emergency" to build a wall and then have DoD/Army build the wall from their budget:
The funny thing is that the Democrat says that previous presidents have used the "national emergency" clause to build facilities in Afghanistan and Iraq...
Democrat Adam Smith is also claiming that since building wall on parts of the border has NOT helped the situation that this means that a wall on the whole border would not help the situation.
Democrat Adam Smith wants to hire more government employees (more government bloat costing much more than the wall) to catch illegals (who would be then catch-and-released to USA) thereby continuing the current broken immigration policy and abused asylum policy.
Everybody who has a working brain should realize that illegal immigrants will cross the border in places where there is NO wall or where there is just a rickety fence or a low barrier one can sit on top of so the ONLY working solution is to build a high wall or high metal barrier with pikes or barbwire on the WHOLE US-Mexico border and then use the current number of government employees to monitor the border wall and stop people from coming over with sensors and sending Border Patrol to meet any illegals trying to cross over and keep them on the Mexican side.