Yesterday, President Biden got the latest numbers on migrant children crossing the border, showing it's expected to hit a record 117,000 children this year. This influx of child migrants is not the first — former Presidents Trump and Obama faced similar crises. So we wanted to take a step back and look at why these surges happen. Get market news worthy of your time with Axios Markets. Subscribe for free.Plus, the dire water situation in Jackson, Mississippi.And, changes to how ads track you online.Guests: Axios' Stef Kight and Sara Fischer and Mississippi Rep. Ronnie Crudup Jr. Credits: "Axios Today" is produced in partnership with Pushkin Industries. The team includes Niala Boodhoo, Sara Kehaulani Goo, Dan Bobkoff, Carol Wu, Nuria Marquez Martinez, Amy Pedulla, Naomi Shavin and Alex Sugiura. Music is composed by Evan Viola. You can reach us at podcasts@axios.com.Go deeper:Scoop: Biden briefing calls for 20,000 child migrant bedsPrivacy laws push online ads beyond trackingLike this article? Get more from Axios and subscribe to Axios Markets for free.