This isn't the first time the US has banned people based on nationality. History shows these exclusions have put our national security at risk and caused rifts with foreign allies.

Twenty years ago, a sheriff won a lawsuit against a federal gun control law. Today, San Francisco is betting the same argument for state's rights will stop Trump from defunding sanctuary cities.

In the 19th century, slaveholders advertised widely for runaway slaves and often hired men to track and capture fugitives. African-American communities offered sanctuary space to the runaways.

A short history of legal challenges to immigrant detention practices in the U.S. may shed light on what's to come for the new administration.

The system is backlogged and inefficient. Trump's commitment to strict immigration enforcement will likely make the problem worse.

Congress has an opportunity to build on DACA's success. An immigration expert explains how.

Our panel of experts examines whether immigration leads to more crime using data from across 200 metropolitan areas and 20 years of research.

A demographer at Penn State surveyed Puerto Ricans on the mainland to see if they had plans to return to the island.

Data reveal how hurricanes affect migration, and what it means for US immigration policy.

US foreign relations have gone online. And the results are not looking good.

Donald Trump's anti-immigrant, anti-NAFTA rhetoric has targeted Mexico and Mexicans.

The Tehuantepec gap in southeastern Mexico, where this month's massive earthquake originated, was long thought to be 'aseismic.' On September 7, scientists learned otherwise.

Three Mexican governors have been arrested in 2017 abroad after fleeing justice, and nearly 90% of the country's citizens see the government as deeply corrupt.

A controversial report claims that Mexico is more violent than Afghanistan and Yemen. It's wrong on the details but right that Mexico is, in effect, a war zone.

A controversial law to officially engage Mexico's armed forces in fighting crime has human rights groups dismayed.

Mexico's 2018 presidential race hasn't even begun, but it's already a nail-biter, featuring two women, a left-wing firebrand, party defections, strange bedfellows and no small dose of scandal.

If the United States withdraws from or significantly alters NAFTA, Mexico has more options than it thinks — and potentially less to lose than its northern neighbour.

China, Russia and the International Monetary Fund are among those contemplating a Venezuela bailout. But help for this debt-stricken nation seems far from assured.

How is a country that was once South America's richest now on the verge of bankruptcy? A Venezuelan economist breaks down his country's descent into chaos.

Venezuelans, fleeing hunger and repression at home, have surpassed Central Americans as the top US asylum-seekers.

Venezuela's opposition has called a 48-hour strike to stop the Maduro government from rewriting the nation’s constitution. But grassroots democracy may not be able to save the Bolivarian Republic.

After the Maduro regime won Venezuela's recent gubernatorial elections, results are contested, people are desperate and the opposition has fractured. Can the resistance survive this setback?

President Nicolás Maduro has announced he will run for reelection, a sign that Venezuela's authoritarian regime now has an electoral strategy for beating the opposition.

Venezuela’s ruling Socialist Party won 39 of 40 major mayoral races on Dec. 10. A victorious President Nicolás Maduro is now likely to call a snap presidential election early next year. Can he win?