With Trump At The Border, A Look Back At U.S. Immigration Policy

President Trump traveled to a Border Patrol station in McAllen, Texas, today, continuing on his campaign to drum up support for a $5.7 billion border wall. The visit came after weeks of Congressional debate about border security that has resulted in a partial government shutdown.

In his address from the Oval Office on Tuesday, Trump described a "humanitarian and security crisis at our Southern border," and focused on crimes committed by undocumented immigrants.

But as NPR has previously reported, studies show that undocumented immigrants in the U.S. commit crimes at a lower rate than native-born Americans.

This fight over the border wall is just one part of the Trump administration's hardline stance on immigration. He's ended DACA, and pushed to make it or to get greencards. He also tried to terminate the Temporary Protected Status program, which was designed to help people affected by environmental disasters or armed conflicts.