Late last year, Rogelio Landin ran for mayor of Detroit on a simple platform: the city should annex some of its surrounding communities. Detroit needs people, and those suburbs need money. With annexation, the city could expand and gain more revenue to share with its new residents.

Landin didn't get many votes, but the idea was provocative. What if metro Detroit acted more like a coherent region, instead of dozens of separate municipalities all going it alone? What could that unlock?

Rogelio Landin spoke with Robyn Vincent about that and more.