On today’s increasingly crowded globe, human migration can strain infrastructure and resources. Accurate data on migration flows could help governments plan for and respond to immigrants. Yet these figures, when available, tend to be spotty and error-ridden, even in the developed world. Researchers have developed approaches to estimate migration rates, but even the best of these rely on unrealistic assumptions about the mass movement of people and yield migration rates that can fall far below reality.

Extreme anti-immigrant views have gained legitimacy and become part of the mainstream political debate over the past ten years through a concerted push by anti-immigrant groups and political figures using stereotypes and outright bigotry to blame immigrants for various problems in America. A new ADL report examines how extreme views on immigrants and refugees have moved from the margins to being a centerpiece of the U.S. political debate.

Just-releases government documents reveal that the underlying intent of the Trump administration’s brutal practice of separating migrant families at the border was, in fact, to deter additional immigration and asylum petitions. Beth Van Schaack writes in Just Security that this is significant, because Trump administration officials have earlier claimed that the forcible separations were mandated by law (thus necessitating congressional action to end the policy) or compelled by “national security” concerns. “We now know neither of these purported justifications is true—this was nothing short of a deliberate policy choice to brutalize parents and their children in order to stop others from seeking refuge in the United States,” Van Schaack writes. “This strengthens the argument I made in an earlier post that the family separation policy is a form of torture for both parents and their children.”

The government pf Mexico has said that anyone approaching the border in a “violent way” will not be allowed to stay in Mexico. Forty-two refugees have been arrested on U.S. soil after running for the border.

A U.S. federal judge has granted a temporary restraining order preventing the Trump administration from carrying out new immigration rules that would block asylum status for people who did not enter the United States at a designated port of entry. President Donald Trump issued the rule in a November 9 proclamation, saying it was necessary to deal with the expected arrival of thousands of migrants at the U.S.-Mexico border who he said “appear to have no lawful basis for admission into our country.”

University of Illinois labor and employment relations professor Michael LeRoy is an expert on immigration and employment law. In a recent interview, LeRoy discusses the implications of President Trump’s bid to potentially end birthright citizenship in the U.S.“After the Civil War, Northern lawmakers had a basic choice: Do we enact laws to end slavery, or do we go beyond and enact laws to achieve America’s ideal that “all men are created equal”? They said yes to both propositions, and part of this idea included birthright citizenship,” LeRoy says.

Robert Bowers, the suspect in Saturday’s deadly shooting spree in Pittsburgh, appears to have hated Jews for a variety of reasons, but one anti-Semitic trope in particular seems to have motivated him in the days prior to the shooting, and may have even played a role in his decision to unleash his hateful attack: the common white supremacist conspiracy theory that Jews are behind efforts to impose mass immigration on the United States, with the goal of harming or destroying the white race.

Fueled by political rhetoric evoking dangerous criminal immigrants, many white Americans assume low-status immigrants from Mexico, El Salvador, Syria, Somalia and other countries have no legal right to be in the United States, new research suggests. In the eyes of many white Americans, just knowing an immigrant’s national origin is enough to believe they are probably undocumented, the study’s co-author says.

Much of the current debate over immigration is about what kind of impact immigrants have on jobs and wages for workers born in the United States. Seldom does anyone talk about how immigration leads to a wider variety of better products for the American consumer. We recently conducted a study to shine more light on the matter.