The Atlantic Daily: Borders and Bots

Immigrant Issues: Mexico's government is not pleased with new memos from the Trump administration requiring people who arrive in the U.S. illegally over the Mexican border to be deported back to Mexico even if they're not Mexican nationals. The country may refuse to cooperate--and it has a lot of leverage. Meanwhile, former DHS secretary Janet Napolitano has emerged as a champion of Obama-era programs protecting undocumented students. But the next big policy fight might be over legal immigration, if lawmakers embrace nationalist sentiments that seek to keep everyone out. Such sentiments were a major reason why Rumana Ahmed, a Muslim woman who served on the National Security Council under Obama, chose to leave the White House eight days into Trump's presidency.