Vice President JD Vance’s visit to Armenia and Azerbaijan succeeded in widening the scope of US economic engagement with the two South Caucasus nations. In the months immediately after Armenia and Azerbaijan signed a provisional peace deal in Washington last August, the Trump administration’s focus was on the development of the Middle Corridor trade and logistics network. But now other sectors, including civilian nuclear energy, arms sales and artificial intelligence, are part of the discussion. Vance’s stop in Baku on February…