Voters are upset about disarray at the US-Mexico border and the increase in illegal crossings under President Biden. But they also reacted negatively to former president Trump’s crackdowns. In both ways, immigration has become more important in our politics, making it more like Europe. Ernesto Tiburcio finds that flows of unauthorized migrants into the US have moved Americans and local governments in a conservative political direction. Areas that have seen more unauthorized flows start voting more Republican and redirect expenditures away from services and toward enforcement. But the backlash may run both ways. In Europe, Alexander Kustov finds that radical-right party success has softened views of immigrants and immigration. But his work also finds that anti-immigration voters prioritize the issue more than those who favor immigration.