Among President Biden's immigration actions is a $4 billion four-year plan to address root causes of migration in Central America. But when lawmakers talk about addressing migration's “root causes,” what do they really mean? And who has a seat at the negotiation table?

Ali talks to Joy Olson, a foreign policy expert and the former executive director of the Washington Office on Latin America, about untangling Trump’s asylum mess, what was missing from previous regional approaches, and what she hopes the Biden administration will focus on.