Both presidents brought border traffic and trade to a standstill in hopes of changing Mexican policy in the drug war. And both failed to achieve their goals.
After 1.3 million migrants from the Middle East and Africa came to Europe in 2015, many countries built fences or closed their ports. That has pushed migrants to take riskier routes into the EU.
Trump has threatened a showdown over funding his proposed barrier between the U.S. and Mexico. Our experts offer a primer – from a history of walls to costs.
Many migrants would have stopped before they reached Europe – if only there had been the opportunities.
Safe passage for vulnerable refugees could help stop thousands from making a perilous journey across the Mediterranean.
Discussions at two global summits on migration in New York will do little to do what is needed to change the reality on the ground.
In two weeks, Brits will cast a vote that could change the future of the European Union. A UCLA expert explores the continent's greatest threats to unity.
The attacks in Paris are putting refugees in the crosshairs, yet it's the integration of these and past migrants that are key to the security of Europe.
Most evidence shows that climate change is caused by humans and immigration is good for the economy. So why do many of us reject these notions anyway?
Although Africa is familiar with large-scale refugee crises, it is uncommon for it to host people seeking protection from outside the continent, as is the case with thousands of Yemeni refugees.
Over 500 years ago, first Jews and then Muslims were expelled from Spain. This summer, Spain's Parliament invited the former back but not the latter. Here's what Cervantes might say to his countrymen.