Why does MAGA complain about illegal aliens?

Is the illegality of their entry the issue, or is it the probability that they will vote for the people who didn't threaten and denigrate and abuse them? Of course, they don't vote at all, but the point seems to be to make people worry about it and then offer a "solution" in the form of deportation.

It is because it is illegal
It is because they might vote for the wrong party
It is because it is a useful campaign tool:
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Why does MAGA complain about illegal aliens?
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