It will be the same geographic area but everything will be changed. Gangs will be in control of areas, muslims will be in control of areas. Mexicans or even Canadians will control some areas. All under Communists over rule. No or very primitive hospitals and medicine. No industry. Living conditions will be like the early 1800s, only worse. No one will have the incentive to better one's self. Nor will they be allowed. For an example, look at the Mid Eastern Refugee Camps without Israeli or U. N.. support.
This is what the Trump haters and Left are inflicting upon themselves.