Migrant is a euphemism for illegal immigrant 

John Oliver doesn’t distinguish between illegal and legal immigrants when discussing crime statistics. 

Most illegal immigrants are from Latin America. You have to compare crime rates between Hispanic illegal vs Hispanic legal vs Hispanic citizens 

25 to 30 percent of incarcerated are foreign born. 

https://townhall.com/columnists/walterewilliams/2018/01/31/immigration-lies-and-hypocrisy-n2441145

The bulk of our immigration problem is with people who enter our country criminally from Mexico, Central America, the Caribbean, Africa and the Middle East. It's illegal immigrants from those countries who have committed crimes and burdened our criminal justice and welfare systems. 
