What is the purpose of building the border wall in the United States, and why does Trump want Mexico to pay?

Trump wants to build a border wall in the United States, restrict illegal immigrants from entering the United States, and crack down on drug smuggling. He has to pay the price for Mexico, because Trump thinks that the drug trade and arms smuggling on the Mexican-American border are too serious. Most illegal immigrants in the United States come from Mexico.

"Building a wall" is one of Trump's most controversial promises during the campaign. And insist on building a wall on the US-Mexico border to control illegal immigrants and crack down on drug smuggling. Due to the repeated prohibition of drug trafficking and arms smuggling on Mexico's northern border, social security issues have also caused great headaches for the US and Mexican governments.

Moreover, among the US 1 1.8 million illegal immigrants, 5.8 million are from Mexico, and most of the rest are from Central American countries. Most illegal immigrants from Central and South America also entered the United States from the northern border of Mexico. Therefore, Trump's move is not only aimed at Mexico, but has built a high wall between the United States and the entire Latin American region.

Trump hopes to prevent illegal immigrants from Mexico and other countries from entering the United States, but he also hopes that Mexico will pay the cost of repairing the wall. Is it beautiful? Trump's campaign team has revealed that the border wall they want to repair will be 3 185 kilometers long, about 16.7 meters high and about 30 centimeters thick. The construction time of the border wall may be as long as four years, and the total cost may reach 25 billion US dollars. In the face of this huge expenditure, Trump insisted during the campaign that the cost of building the wall would be paid by Mexico. Mexico also made it clear that they would not pay the money.