The document discusses Mexican immigration to the United States. It states that in 2013 there were over 11.7 million Mexican immigrants living in the US illegally, and this number is rising continuously. Many Americans are opposed to this as they believe it damages US systems like healthcare, welfare, and the economy. As a result, the US government decided to build a border wall between the US and Mexico to try to stop undocumented Mexicans from entering. However, the author argues that a border wall is not a good long-term solution to the issue.