For decades, illegal immigration has been an extremely controversial issue. It is undeniably as contentious a problem now as it has ever been because President Trump campaigned on it in 2016 as the top issue.

There are many reasons why people around the world are trying to reconstruct their lives in a foreign country. Some do it to get a job or an education. Others are forced to escape persecution or abuses of human rights, such as torture.

The growth of the American economy and culture as a whole is profoundly influenced by immigration to the United States that are marked illegal by the U.S. Immigration Law. Called by the financial appeal of a better life, politically or religiously oppressed in the countries of departure, escaping conflicts, natural disasters or suffering, or simply motivated by the desire to live a fragment of the American dream, immigrants search and ultimately find numerous ways to gain entry into the U.S. territory, lawfully or illegally, alone or accompanied by their families, on water, air or land.

Immigration, in general, has no impact on the salaries and employment of U.S.-born workers in the context of wages and jobs. The economic effect of immigration on both incomes and job rates of U.S. natives, over a span of more than 10 years, is reportedly "very small". Illegal immigration favors the United States and has a positive impact on the economy. The advantage of low-skilled, low-wage labour is so great that employers are ready to face fines and often even prison sentences to recruit illegal foreign workers.

One study by Gordon Hanson, San Diego Professor of Economy at the University of California, on the impact of illegal immigration on the economy of the United States concluded that the economic advantage is essentially zero. Employers win in the end, while illegal immigration causes indigenous workers to struggle. Taking into account both of these variables, Hanson called the overall effects “a wash." Border and internal enforcement costs are significantly higher than the tax savings from reducing the number of illegal immigrants entering the U.S.

In conclusion, illegal immigrants do not invade, they simply comply with the labour market's natural laws and do not operate as long as they do not have access to certain facilities, such as health services. They can't make the U.S. poorer because they are being paid the lowest wages, an amount a native would never accept.