States bordering Mexico sell a lot of stuff to Mexico, while the rest generally sell to Canada. The Mississippi-Panama nexus appears to be mostly about petroleum products, and I assume reflects a larger supply chain rather than Panama as a final destination for everything. Connecticut exports a lot of aviation equipment, possibly bound for Airbus in France. Nevada is a big exporter of precious metals, perhaps to the Swiss watch industry.
Vox's journalism is free because we believe that everyone deserves to understand the world that they live in. That kind of knowledge helps create better citizens, neighbors, friends, parents, consumers and stewards of this planet. In short, understanding benefits everyone. You can join in on this mission by making a financial gift to Vox today. Reader support helps keep our work free, for everyone. Will you join us?