Irrelevant, at least initially.
What IS relevant, codified, and CENTRAL to this issue which few if any talk about is THE U.S. CONSTITUTION, the Supreme law of the Land.
The Constitution expressly mandates the federal government PREVENT INVASION (Art. IV, Sec. 4). Illegal immigration and immigration of our enemies is invasion.
Trump needs no permission to prevent illegal immigration and immigration of our enemies. He has clear constitutional support for doing so.
“Invasion” used to mean Japanese propeller planes flying toward us. Now it may mean foreign cyber intruders draining company bank accounts or stealing American innovations and inventions to allow the Chinese to coast on our expensive research work. Also cyber shut downs of water supply in small and large cities, leading to potential abrupt re-starts which would burn out enormous devices that would take months to replace.
Another “invasion” is when that commie Mexican leader told his trashy millions to swarm ahead to the borders of the US and break through them. THAT is an act of war and an invasion.
The Bible has walls all over the place (Joshua circling one, David breaching enemy walls, God warning “your walls will not be able to hold back the enemy” as a warning if people sinned.