No. of Recommendations: 8
"Oh, I am for the bill for several reasons, one of which is that Trump will wield the authority in a way I think serves the country better than Biden."
LOL. Biden tries to be effective at the border. Trump just tried to be cruel at the border to feed his bloodthirsty cult. The fact that you think one was more effective than the other says a lot about you as a person.
"However, I am asking a very real world question, when the border is closed, what does that look like, do migrants pile ever deeper on the Mexican side, if not, why not?
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I know that as a user of poor information sources you are ill informed, but as an answer to your question, why not look to the recent past when Biden actually shut down the border. I would link to examples but you would not believe me. It is easy to find if you really care. If you are just looking to reinforce your ignorant view, then nevermind.
"Piling up on the Mexican side may not be acceptable to Mexico, why would it? Then what?"
That is sort of the point. Mexico didn't like it when we shut down the border, it was important to them to keep it open (their economy pretty much relies on it). So when the border was shut down, they started acting more responsibly. It is important to Mexico that their goods are able to easily enter the U.S., so they will do whatever it takes to continue that, including stopping people before they ever get to our border.