We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
This would be easy to stop. Perhaps it would be a little messy on the evening news but it would be easy to do. A few hundred or a few thousand (depending on how many "immigrants" are coming over the border) military police with a few thousand handcuffs. Transport trucks and a convenient place to pen them in right on the border. Each soldier grab one (or two soldiers grab one if they resist), handcuff them and load them into a truck. Get them to the holding area and search them, fingerprint them and get their information into a law enforcement computer system. Give them a choice: Exit on the side of the compound back into the country that they entered from or sit there until they change their mind. No food, just water.