What to watch in AMLO's meeting with Harris

• But the Biden administration is signaling a willingness to collaborate on the many other issues important to both countries (but that are usually overshadowed by migration).
• Mexico, for example, would like the U.S. to do more to stop illicit gun trafficking and keep those weapons out of cartels’ hands.

The Biden administration is also pressing an anti-corruption campaign in the region, and corruption is a heated topic in Mexico.

• An elevated section of the capital's newest subway line, the No. 12, collapsed on Monday, killing at least 25 people and leaving 50 more hospitalized. At least 9 are still missing.

Driving the news: The No. 12 line had been plagued by problems since its inception, with accusations of poor planning by a congressional commission and international bodies.

• The railways and cars were bought separately and did not initially fit together properly, so any movement created excessive wear.
• A handful of officials were sent to prison under fraud allegations for their handling of the contracts.
• Neighbors near the overpass had reported apparent structural damage from a 2017 earthquake and lack of maintenance.

The bottom line: The Mexican government has promised an independent investigation of the collapse, and the White House has offered assistance in rebuilding.