Drones and other technologies have been developed to watch over the border. Non lethal weapons such as tear gas for example can stop illegals from crossing.
1. Who shut down the government by threatening to veto a budget, a budget previously passed by the Senate in a 100-0 vote? 2. It's not an eeny teeny $5 Billion. It's $5.6 Billion this year and Billions in subsequent years until about $30 Billion is siphoned off either the economy or other desperately needed projects; 3. It's Trump that's destroying lives and hurting the economy all ready in trouble because of the trade wars. Somebody in here once said "Stupid is as stupid does" and I think that fits Trump to a tee.
It means that all People go knock on thier neighbors door and pass the news. Snail mail chain mail. Words spread like butter in toast.