Here is my suggestion to make America great again!!:
Take the nation which has the 69th largest economy according to the United Nations, and has a history of corruption in its government, along with low educational standards and low achievers, and allow them to flood the country with their poor and unskilled who can't even succeed in their crappy country.
Take about 10 million of them, and don't waste the money to screen them for health/diseases, insist on taking only the ones who break the laws on entering the country, and promise them at least half will get assistance from the taxpayers of the United States. The ones that do work will get paid under the table and not have all their taxes taken out, and will get to send their surplus back home to their families who are also soon to be invited under the same conditions.
The only other requirement is that 3/4th's of them are overweight.
What could possibly go wrong?