Practically not. The US is a developed country with a high literacy rate and more educated & more conscious people. Moreover, the government is well aware of dealing with such situations. So there are no chances of Civil war within the United States.

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I agree with you that the United States is a developed country that has already kind of outgrown the tendencies of going into a civil war but there's been a series and pockets of civil unrest in some region of the country and the government does not seem to address these issues head on even when these things have been happening over the years and increasing in numbers.

I know this is the reason why Donald Trump has frown against the immigrants and promised to deport them back to their country which I heard the first batch of deported immigrants for Nigeria was taken back to their country but we also need to keep asking whether it is the immigrants that are the cause of these challenges or it is the government that has not stabilized security so well that the citizens carry out different heinous activities but have sentiments built around it to cover or justify their wrongdoing.