How Mexico outfoxed Joe Biden on illegal immigration, knowing he’d never fight back

The collective effect of a new Mexican law quietly passed right after the November U.S. election was that thousands of migrant families found that they were not only freed from Mexican detention centers, but that, when they crossed the U.S. border, the Americans would have to keep them. Mexican government officials wagered President Biden would take all the families without resistance and threaten nothing like Trump’s trade tariffs. They were right.