What does Alan kraut mean when he says there has always been a tussle over immigration

this

Explanation:

We're a nation of immigrants, but we endlessly argue about who to ... history, there has always been a tussle over immigration,” says Alan Kraut, ... “We will find you, we will arrest you, we will jail you, and we will deport you,

an era of negotiation.

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in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

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